July 7, 1994
_ _ _
/ / (_)
_\ \ \
(_)_/_/ ASPI-ID v1.0 -
Displays SCSI Mode Sense and Inquiry information via the ASPI device
driver.
Copyright 1994, Seagate Technology, Inc. All rights reserved.
Seagate Technology, Inc.
B-5 Technical Support
920 Disc Drive
Scotts Valley, CA 95066
===============================================================
Usage: ASPI-ID [SCSI ID] [optional: R or D] or....
ASPI-ID /filename.ASP
switches:
SCSI ID - A valid SCSI ID in the range 0 to 6
The optional R and D switches will only work if the SCSI ID
switch is also set on the command line. ex: ASPI-ID 0 D
R - allow command line Redirection; this feature is
useful for redirecting the output to a printer or a
file.
D - Dump the SCSI Mode Sense and Inquiry binary data to
<filename>.ASP; this allows a copy to be saved that
can be studied at a later time. A "collection" of
various drive files might be useful for reference
purposes.
/filename.ASP - load a previously saved ASPI data dump. The ASPI
device driver is not required in memory for this
feature. Therefore, non-SCSI systems can be used to
load and display a saved file.
(no switches) - prompt for SCSI ID info
ASPI-ID is designed for the support of users with Seagate disc drives and
has been tested with Adaptec, Acculogic, Always, DPT and Ultrastor
SCSI host adapters with their associated ASPI device drivers.
(These represent the HA's we had laying around in Tech Support, other
HA's with ASPI drivers should also work.)
===============================================================
A little background:
"ASPI" stands for Advanced SCSI Programming Interface. It is an
Adaptec-developed interface specification for sending commands to SCSI
host adapters. The interface provides an abstraction layer that
insulates the programmer from considerations of the particular host
adapter used. The ASPI manager accepts ASPI commands and performs the
steps necessary to send the SCSI command to the target. For example,
although the Adaptec AHA-152x and AHA-274x host adapters have very
different hardware, the ASPI interface to these boards is the same.
Unlike AT bus based disc drive interfaces, which tend to have common
well definded register level instructions, SCSI controllers are not
nearly so constrained. In other words, it is up to the host adapter
manufacturer to supply the link between the actual hardware
controlling the SCSI bus, and the service calling software, usually
the operating system. Although this increases flexibility for changes
to the host adapter, it precludes direct universal hardware port
calls.
The "linking" software has to be supplied by the host adapter
manufacturer either in the form of a BIOS, or equivalent software
module in the form of a device driver. Because each host adapter
manufacturer uses different SCSI support hardware, it is impossible
for a drive manufacturer to supply software support for all SCSI host
adapters.
Fortunately, thanks to the ASPI, a common ground is established that
allows a software program to communicate directly with the SCSI
device. The only requirement is that the user must install an ASPI
device driver (usually in CONFIG.SYS) that was written by the host
adapter OEM. DOS ASPI device drivers are usually supplied with the
host adapter or are freely available via support BBS's because of
their common usage with SCSI CD-ROMs and tape backup systems.
The ASPI command codes utilized in ASPI-ID are:
Host Adapter Inquiry -
ID ofHost Adapter
SCSI Manager ID (the name given to the ASPI driver by the host
adapter manufacturer)
Host Adapter ID (the name of the host adapter)
Get Device Type -
Peripheral Device Type of target
Execute SCSI I/O Command -
SCSI Inquiry (12h) (returns information about the drive. see
Appendix D for detailed information)
SCSI Mode Sense (1Ah) (returns many pages of detailed
information about the drive. see
Appendix C for detailed information)
SCSI Read Capacity (25h) (returns the number of the last
logical block and the block size)
Get Disk Drive Information -
INT13 drive numnber
Preferred Head Translation
Preferred Sector Translation
===============================================================
The follow SCSI command and mode page definitions are taken from
a Seagate SCSI drive product manual. The purpose for including
it in this doc file is to help clarify the information returned
by the ASPI-ID program. It is not intended to be a complete
SCSI reference.
3.4.13 Mode Sense command (1AH)
===============================================================
When the initiator sends this command to the drive, it returns
mode-page parameters to the initiator. This command is used in
conjunction with the Mode Select command.
Bits 7 6 5 4 3 2 1 0
Bytes
0 0 0 0 1 1 0 1 0
1 LUN 0 0 0 0 0
2 PCF Page code
3 0 0 0 0 0 0 0 0
4 Allocation length
5 0 0 0 0 0 0 Flag Link
Byte 2 The page control field (PCF) determines the content of Mode
Parameter bytes. Regardless of the value of the PCF, the
block descriptor always contains the current values.
PCF bit 7 PCF bit 6 Effect
0 0 Return current values.
0 1 Return changeable values.
1 0 Return default values.
1 1 Return saved values.
The page code is the designator that is unique to each page.
The page codes are listed in Section 3.4.13.1.
Byte 4 The allocation length specifies the number of bytes that the
initiator has allocated for returned Mode Sense data. An
allocation length of 0 means that no Mode Sense data is to
be transferred. This condition is not considered an error.
Any other value represents the number of bytes to be
transferred. For a description of the allocation length, see
Section 3.4.13.1.
3.4.13.1 Page code and allocation length
The Mode Sense command descriptor block contains a page code (byte 2,
bits 5--0) and an allocation length (byte 4). These parameters are
described in the following table. You can transfer mode pages to the
initiator either of two ways:
- Transfer all mode pages at once by using page code 3FH, as de-
scribed in the last row of this table, or
- Transfer one mode page at a time by using the page code and
allocation length of the mode page.
Page Allocation Mode Sense data returned
code length
01H 18H 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
10 bytes of Error Recovery parameters
02H 18H 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
12 bytes of Disconnect/Reconnect parameters
03H 24H 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
24 bytes of Format Device parameters
04H 20H 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
20 bytes of Rigid Disc Geometry parameters
08H 20H 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
20 bytes of Caching parameters
0CH 24H 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
24 bytes of Notch and Partition parameters
0DH 18H 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
12 bytes of Power Condition parameters
38H 1CH 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
16 bytes of Cache Control parameters
3CH 0FH 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
3 bytes of Soft ID parameters
00H 10H 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
4 bytes of Operating parameters
3FH 143 or 144 4 bytes of Mode Sense header
8 bytes of block descriptor
2 bytes of mode-page header
143 or 144 bytes of mode parameters,
including all mode pages
* The allocation length depends on whether the Operating page has 2 or
3 bytes. The Operating page is described in Appendix C.10.
3.4.13.2 Mode Sense data
The Mode Sense parameter list contains a 4-byte header followed by an
8-byte block descriptor (if any), followed by the mode pages. The
header and block descriptor are shown below. The mode pages are
described in Appendix C.
Bits 7 6 5 4 3 2 1 0
Bytes
0 Mode Sense data length
1 (default) Medium type (00H)
2 WP=0 Reserved
3 (default) Block descriptor length (08H)
Block descriptor
4 (default) Density code (00H)
5--7 Number of blocks
8 (default) Reserved (00H)
9--11 Block length
Mode pages
12--n Mode pages
Byte 0 The Mode Sense data length specifies the number of
bytes minus 1 of the Mode Sense data to be transferred
to the initiator.
Byte 1 The medium type is always 0.
Byte 2 The WP (write protect) bit is always 0, which means the media
is write-enabled.
Byte 3 The block descriptor length is the number of bytes in the
block descriptor. This value does not include the page headers
and mode pages that follow the block descriptor, if any.
Byte 4 The density code is not supported.
Bytes 5--7 The number of blocks field contains the total number
of blocks available to the user, which is specified on page 1.
Byte 8 Reserved
Bytes 9--11 The block length specifies the number of bytes
contained in each logical block described by the block
descriptor.
Appendix B. Sense data
===============================================================
The appendix contains the descriptions for sense data returned by the
Request Sense command. For more information on the Request Sense
command, see the Seagate SCSI-2 Interface Manual, publication number
77738479.
B.1 Additional sense data
===============================================================
When the initiator issues a Request Sense command, the drive returns
the following additional sense data.
Bit 7 6 5 4 3 2 1 0
Bytes
0 Valid Error code
1 1 1 0 0 0 X
1 Segment number (00H)
2 0 0 ILI 0 Sense key
3--6 Information bytes
7 Additional sense length
8--11 Command specific data
12 Additional sense code
13 Additional sense code qualifier
14 FRU code
15 SKSV
16--17 Sense key specific
18--22 Product-unique sense data (00H)
Byte 0 If the valid bit is one, the information bytes (bytes 3
through 6) are valid. If the valid bit is zero, the
information bytes are not valid.
If the error code contains a value of 70H, the error
occurred on the command that is currently pending. If the
error code contains a value of 71H, the error occurred
during the execution of a previous command for which a good
status has already been returned.
Byte 1 The segment number is always zero.
Byte 2 If the incorrect length indicator (ILI) bit is zero, the re-
quested block of data from the previous command did not
match the logical block length of the data on the disc. If
the ILI bit is one, the requested block of data from the
previous command matched the logical block length of the
data on the disc.
The sense key indicates one of nine general error cate-
gories. These error categories are listed in Appendix B.2.
Bytes 3--6 When the valid bit is 1, the information bytes contain
the logical block address of the current logical block
associated with the sense key. For example, if the sense
key is media error, the information bytes contain the
logical block address of the offending block.
Byte 7 The additional sense length is limited to a maximum of 0EH
additional bytes. If the allocation length of the command
descriptor block is too small to accommodate all of the
additional sense bytes, the additional sense length is not
adjusted to reflect the truncation.
Bytes 8--11 These bytes contain command-specific data.
Bytes 12--13 The additional sense code and additional sense code
qualifier provide additional details about errors. See Ap-
pendix B.3.
Byte 14 The field replaceable unit (FRU) code is used by field
service personnel only.
Bytes 15--22 These bytes are not used and are always zero.
B.2 Sense key
===============================================================
The sense keys in the lower-order bits of byte 2 of the sense data
returned by the Request Sense command are described in the following
table. You can find a more detailed description of the error by
checking the additional sense code and the additional sense code
qualifier in Section B.3.
Sense key Description
0H No Sense. In the case of a successful command, no specific
sense key information needs to be reported for the drive.
1H Recovered error. The drive completed the last command
successfully with some recovery action. When many recovered
errors occur during one command, the drive determines which
error it will report.
2H Not ready. The addressed logical unit cannot be accessed.
Operator intervention may be required to correct this
condition.
3H Medium error. The command was terminated with a
nonrecoverable error condition, probably caused by a flaw in
the media or an error in the recorded data.
4H Hardware error. The drive detected a nonrecoverable hardware
failure while performing the command or during a self-test.
This includes, for example, SCSI interface parity errors,
controller failures and device failures.
5H Illegal request. An illegal parameter in the command
descriptor block or in the additional parameters supplied as
data for some commands (for example, the Format Unit
command, the Mode Select command and others). If the drive
detects an invalid parameter in the CDB, it terminates the
command without altering the media. If the drive detects an
invalid parameter in the additional parameters supplied as
data, the drive may have already altered the media.
6H Unit attention. The drive may have been reset. See the
Seagate SCSI-2 Interface Manual for more details about the
Unit Attention condition.
BH Aborted command. The drive aborted the command. The
initiator may be able to recover by retrying.
EH Miscompare. The source data did not match the data read from
the media.
B.3 Additional sense code and additional sense code qualifier
===============================================================
The additional sense code and additional sense code qualifiers
returned in byte 12 and byte 13, respectively, of the Sense Data
Format of the Request Sense command are listed in the following table.
Error code (hex) Description
Byte 12 Byte 13
00 00 No additional information is supplied.
01 00 There is no index/sector signal.
02 00 There is no seek complete signal.
03 00 A write fault occurred.
04 00 The drive is not ready and the cause is not
reportable.
04 01 The drive is not ready, but it is in the process of
becoming ready.
04 02 The drive is not ready; it is waiting for the
initializing command.
04 03 The drive is not ready; human intervention is
required.
04 04 The drive is not ready; the format routine is in
process.
05 00 The drive does not respond when it is selected.
06 00 Track 0 was not found.
07 00 More than one drive is selected at a time.
08 00 There was a drive communication failure.
08 01 A drive communication time-out occurred.
08 02 A drive communication parity error occurred.
09 00 A track following error occurred.
0A 00 An error log overflow occurred.
0C 01 A write error occurred, but the error was recovered
using auto-reallocation.
0C 02 A write error occurred. Auto-reallocation was
attempted, but it failed.
10 00 An ID CRC or ECC error occurred.
11 00 An unrecovered read error occurred.
11 01 The read retries were exhausted.
11 02 The error was too long to correct.
11 03 There were multiple read errors.
11 04 A read error occurred. Auto-reallocation was
attempted, but it failed.
12 00 The address mark was not found in the ID field.
13 00 The address mark was not found in the data field.
14 00 No record was found.
14 01 No record was found.
15 00 A seek positioning error occurred.
15 01 A mechanical positioning error occurred.
15 02 A positioning error was detected by reading the media.
16 00 A data synchronization mark error occurred.
17 00 The data was recovered without applying error
correction or retrying.
17 01 The data was recovered with retries.
17 02 The data was recovered with positive head offset.
17 03 The data was recovered with negative head offset.
17 05 The data was recovered using the previous sector ID.
17 06 The data was recovered without ECC. The drive uses
data auto-reallocation.
18 00 The data was recovered with ECC.
18 01 The data was recovered with ECC and retries.
18 02 The data was recovered with ECC, retries, and
auto-reallocation.
19 00 There is an error in the defect list.
19 01 The defect list is not available.
19 02 There is an error in the primary defect list.
19 03 There is an error in the grown defect list.
1A 00 A parameter overrun occurred.
1B 00 A synchronous transfer error occurred.
1C 00 The defect list could not be found.
1C 01 The primary defect list could not be found.
1C 02 The grown defect list could not be found.
1D 00 During a verify operation, a compare error occurred:
the source data did not match the data read from the
media.
1E 00 An ID error was recovered.
20 00 The drive received an invalid command operation code.
21 00 The logical block address was not within the
acceptable range.
22 00 The drive received a CDB that contains an invalid bit.
(This error code applies to direct-access devices.)
24 00 The drive received a CDB that contains an invalid bit.
(This error code applies to all SCSI devices.)
25 00 The drive received a CDB that contains an invalid LUN.
26 00 The drive received a CDB that contains an invalid
field.
26 01 The drive received a CDB containing a parameter that
is not supported.
26 02 The drive received a CDB containing an invalid
parameter.
26 03 The drive received a CDB containing a threshold
parameter that is not supported.
29 00 A power-on reset or a bus device reset occurred.
2A 00 Some parameters were changed by another initiator.
2A 01 The Mode Select parameters were changed by another
initiator.
2B 00 The microcode was downloaded.
2F 00 The tagged commands were cleared by another initiator.
30 01 The media cannot be read because the format is not
recognized.
30 02 The media cannot be read because the format is
incompatible with certain parameters.
31 00 The media format is corrupted.
31 01 The format command failed.
32 00 There are no spare defect locations available.
32 01 An error occurred when the defect list was being
updated.
37 00 A rounded parameter caused an error.
3D 00 The identify message contains invalid bits.
3F 00 The target operation command was changed.
3F 01 The microcode was changed.
3F 02 The drive was operating as a SCSI drive and is now
operating as a SCSI-2 drive, or vice versa.
3F 03 The inquiry data was changed.
40 00 The RAM failed.
40 8x A correctable ECC error occurred; x equals the length
of the error.
40 90 A configuration error occurred.
40 A0 The self-test routine discovered an error in a ROM.
40 A1 The self-test routine discovered an error in the
processor RAM.
40 A2 The self-test routine discovered an error in the
buffer RAM.
40 A3 The self-test routine discovered a SCSI protocol
error.
40 A4 The self-test routine discovered a DMA error.
40 A5 The self-test routine discovered an error in the disc
sequencer.
40 A6 The self-test routine discovered an error in the disc
sequencer RAM.
40 A7 A self-test error occurred.
40 A8 The flash memory cannot be read or written.
40 A9 The flash memory directory cannot be read, or it is
corrupted.
40 AA The flash memory contains an incompatible version
number.
40 AB The flash memory contains an incompatible revision
number.
40 AC A flash memory checksum error occurred.
40 AD The flash memory contains invalid parameters.
40 AE The flash memory is incompatible with the HDA and the
circuit board. The flash memory must be reconfigured.
40 B0 The servo command timed out.
40 B1 The servo command failed.
40 B2 The servo command was rejected.
40 B3 The servo interface does not work.
40 B4 The servo either failed to lock on track during spinup
or has wandered off track.
40 B5 An internal servo error occurred.
40 B6 During spinup, a servo error occurred.
40 B7 The servo pattern is inconsistent.
40 B8 A seek recovery error occurred.
40 B9 The actuator did not achieve high-speed calibration.
40 C0 The defect list is full.
40 C1 A failure occurred while the grown defect list was
being written.
40 C2 The write life-cycle of the flash memory has been
exceeded.
40 C3 There was an attempt to add an illegal entry to the
grown defect list.
40 C4 There was an attempt to add a duplicate entry to the
grown defect list.
41 00 A data path diagnostic failed.
42 00 A power-on or self-test failure occurred.
43 00 A message reject error occurred.
44 00 An internal controller error occurred.
45 00 An error occurred during a selection or a reselection.
47 00 A SCSI interface bus parity error occurred.
48 00 The initiator has detected an error.
49 00 The initiator received an invalid message from the
drive.
4C 00 The drive failed to self-configure.
4E 00 The drive attempted to perform overlapped commands.
5B 00 There was a log exception.
5B 01 A threshold condition was met.
5B 02 The log counter has reached its maximum value.
5B 03 All the log list codes have been used.
5C 00 There was a change in the RPL status. The drive lost
synchronization.
Appendix C. Mode pages
===============================================================
Mode pages are groups of parameters stored by the drive. These
parameters can be read using the Mode Sense command and changed using
the Mode Select command. These commands are described in Sections
3.4.10 and 3.4.13.
This appendix contains the default parameters and the changeable
parameters for the mode pages. The current parameters and the saved
parameters are not shown.
Note. The default values contained in this appendix may differ from
the default values actually contained in your drive. To determine the
default values, use the Mode Sense command.
Contains
changeable
Mode page Page code Bytes parameters
Error Recovery page 01H 10 Yes
Disconnect/Reconnect page 02H 14 Yes
Format Device page 03H 22 Yes
Rigid Disc Geometry page 04H 22 Yes
Caching page (SCSI-3) 08H 18 Yes
Control Mode page 0AH 10 Yes
Notch page 0CH 22 No
Cache Control page 38H 14 No
Soft ID page 3CH 1 Yes
Operating page 00H 2 or 3 Yes
For all mode pages:
- If the changeable value is 0, the initiator cannot change the bit
directly. If the changeable value is 1, the initiator can change the
bit directly.
For example, in the header below, the changeable value for the page
code bits is 0, which means that the page code cannot be changed; the
changeable value of the PS bit is one, which means that the PS bit can
be changed.
- During the Mode Sense command, the PS (parameter savable) bit is 1,
which means the mode page is saved on the disc. During the Mode
Select command, you must set the PS bit to 0.
- An X means that the value of the bit cannot be specified. For
example, the default value of bit 0 of byte 1 of page 00H (the
Operating Page) cannot be specified because the bit can be either 1
or 0.
All mode pages contain a 2-byte header that contains the page code and
the page length for that particular page. The header is shown below.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS Page code
changeable 1 0 0 0 0 0 0 0
1 Page length
changeable 00H
Byte 0 During the Mode Sense command, the PS (parameter savable)
bit is 1, which means the mode page is saved on the disc.
During the Mode Select command, you must set the PS bit to
0. The page code is the unique code that identifies the
page.
Byte 1 The page length is the length, in bytes, of the page.
C.1 Error Recovery page (01H)
===============================================================
The Error Recovery page is shown below. This table summarizes the
function, the default value and the changeability of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (01H)
1 Page length (0AH)
2 AWRE ARRE TB RC EER PER DTE DCR
default 0 0 0 0 0 0 0 0
changeable 1 1 1 1 1 1 1 1
3 (default) Read retry count (20H)
changeable FFH
4 (default) Correction span (16H)
changeable 00H
5 (default) Head offset count (00H)
changeable 00H
6 (default) Data strobe offset count (00H)
changeable 00H
7 (default) Reserved (00H)
changeable 00H
8 (default) Write retry count (20H)
changeable 00H
9 (default) Reserved (00H)
changeable 00H
10--11 (default) Recovery time limit (FFFFH)
changeable 0000H
Byte 2 When the automatic write reallocation enabled (AWRE) bit is
1, the drive automatically reallocates bad blocks detected
while writing to the disc. When the AWRE bit is 0, the drive
does not perform automatic reallocation; instead, the drive
reports a check condition status with a sense key of media
error.
Note. The AWRE bit does not apply during the Format com-
mand.
When the automatic read reallocation enabled (ARRE) bit is
1, the drive automatically reallocates bad blocks detected
while reading from the disc. When the ARRE bit is 0, the
drive does not automatically reallocate bad blocks. Instead,
a check condition status is reported with a sense key of
media error.
The transfer block (TB) bit is not supported.
When the read continuous (RC) bit is 1, the drive sends all
data without doing any corrections. This function supersedes
other bits in this byte. When the RC bit is 0, the
correction is performed according to the other bits in this
byte.
The enable early recovery (EER) bit is not supported.
The post error (PER) bit is not supported.
The disable transfer on error (DTE) bit is not supported.
When the disable correction (DCR) bit is 1, the drive does
not apply offline ECC to the data even if it can correct the
data.
Byte 3 The read retry count field is the maximum number of times
the drive attempts its recovery algorithms. If the EER bit
of byte 2 is 1, the number of retries specified by read
retry count (up to a maximum of nine retries) is performed
before ECC is applied. The read retry count field has a
range of 0 through 20H. A read retry count of 0 means that
no retries are performed.
Byte 4 The correction span is the size of the largest read data
error, in bits, on which ECC correction is attempted. Longer
errors are reported as nonrecoverable.
Byte 5 The head offset count is not implemented. Head offsets are
performed as part of the drive’s retry algorithms.
Byte 6 The data strobe offset count is not implemented.
Byte 7 Reserved
Byte 8 The write retry count field contains the maximum number of
times the drive attempts its recovery algorithms. If the EER
bit is set, the number of retries specified by the retry
count, up to a maximum of nine retries, is performed before
ECC is applied. The write retry count field has a range of 0
through 20H. A write retry count of 0 means that no retries
are performed.
Byte 9 Reserved
Bytes 10--11 The recovery time limit field always has a value of
FFFFH, which means that the recovery time is unlimited.
C.2 Disconnect/Reconnect page (02H)
===============================================================
The Disconnect/Reconnect page is shown below. This table summarizes
the function, the default value and the changeability of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (02H)
1 Page length (0EH)
2 (default) Buffer full ratio (F0H)
changeable FFH
3 (default) Buffer empty ratio (10H)
changeable FFH
4--5 (default) Bus inactivity limit (0000H)
changeable 0000H
6--7 (default) Disconnect time limit (0000H)
changeable 0000H
8--9 (default) Connect time limit (0000H)
changeable 0000H
10--11 (default) Maximum burst size (0000H)
changeable 0000H
12--15 (default) Reserved (00000000H)
changeable 00000000H
Byte 2 The buffer full ratio field indicates, on Read commands, how
full the drive’s buffer is before reconnecting. The drive
rounds up to the nearest whole logical block. This parame-
ter is the numerator of a fraction that has 256 as its
denominator.
Byte 3 The buffer empty ratio field indicates, on Write commands,
how empty the drive’s buffer is before reconnecting to
fetch more data. The drive rounds up to the nearest whole
logical block. This parameter is the numerator of a fraction
that has 256 as its denominator.
Bytes 4--5 The bus inactivity limit field indicates the time, in
100-msec increments, that the drive can assert the Busy
signal without handshakes until it disconnects. The drive
can round down to its nearest capable value. If the bus
inactivity limit is 0000H, the drive maintains the BSY--
signal for 1 msec without handshakes.
Bytes 6--7 The disconnect time limit field indicates the minimum
time, in 100-msec increments, the drive remains discon-
nected until it attempts to reconnect. A value of 0
indicates that the drive is allowed to reconnect
immediately.
Bytes 8--9 The connect time limit field indicates the maximum
time, in 100-msec increments, that the drive should remain
connected until it attempts to disconnect. The drive may
round to its nearest capable value. A value of 0 means that
the drive can remain connected indefinitely until it tries
to disconnect.
Bytes 10--11 The maximum burst size field limits the amount of data
that can be transferred during the data phase before the
drive disconnects from the host. The value, multiplied by
512, indicates the maximum number of bytes that can be
contained in a single burst. A value of 0 means that there
is no limit to how many bytes can be transferred during a
single burst.
Bytes 12--15 Reserved
C.3 Format Device page (03H)
===============================================================
The Format Device page is shown below. This table summarizes the
function, the default value and the changeability of each bit. This
page is sent only before the Format Unit command is sent. The drive
parameters are updated immediately, but any changes between these
current parameters and the existing media format do not take effect
until after the Format Unit command is completed.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (03H)
1 Page length (16H)
2--3 (default) Tracks per zone (0001H)
changeable 0000H
4--5 (default) Alternate sectors per zone (0001H)
changeable 0000H
6--7 (default) Alternate tracks per zone (0000H)
changeable 0000H
8--9 (default) Alternate tracks per volume (0008H)
changeable 0000H
10--11 (default) Sectors per track (0058H)
changeable 0000H
12--13 (default) Data bytes per physical sector (0200H)
changeable 0000H
14--15 (default) Interleave (0001H)
changeable 0000H
16--17 (default) Track skew factor (0002H)
changeable 0000H
18--19 (default) Cylinder skew factor (0009H)
changeable 0000H
20 SSEC HSEC RMB SURF Reserved
default 1 0 0 0
changeable 0 0 0 0 0 0 0 0
21--23 (default) Reserved (000000H)
changeable 000000H
Bytes 2--3 The tracks per zone field indicates the number of
tracks the drive allocates to each defect-management zone.
Spare sectors or tracks are placed at the end of each
defect- management zone. If each zone is treated as
containing one track, the valid value for tracks per zone is
1. If each zone is treated as containing one cylinder, the
valid value is equal to the number of read/write heads.
Bytes 4--5 The alternate sectors per zone field indicates the
number of spare sectors to be reserved at the end of each
defect- management zone. The drive defaults to one spare
sector per zone. If each zone is treated as containing one
track, the valid value for alternate sectors per zone is 1.
If each zone is treated as containing one cylinder, the
valid values are 1 through 3.
Bytes 6--7 The alternate tracks per zone field indicates the
number of spare tracks the drive reserves at the end of each
defect-management zone. A value of 0 indicates that no spare
tracks are reserved at the end of each zone for defect
management.
Bytes 8--9 The alternate tracks per volume field indicates the
number of spare tracks to be reserved at the end of the
drive for defect management. The default is equal to twice
the number of read/write heads.
Bytes 10--11 The sectors per track field indicates the number of
physical sectors the drive allocates per track. The drive
reports the average number of physical sectors per track
because the number of sectors per track varies between the
outer and inner tracks.
Bytes 12--13 The data bytes per physical sector field indicates the
number of data bytes allocated per physical sector.
Bytes 14--15 The interleave field is the interleave value sent to
the drive during the last Format Unit command. This field is
valid only for Mode Sense commands. The drive ignores this
field during Mode Select commands. The interleave is always
1:1.
Bytes 16--17 The track skew factor field indicates the number of
physical sectors on the media between the last logical
block of one track and the first logical block of the next
sequential track of the same cylinder. The actual track skew
factor that the drive uses is different for every zone. The
default value is 0002H, which is the track skew factor for
the first zone. This default value is only used when tracks
per zone and alternate sectors per zone are set to 1.
Bytes 18--19 The cylinder skew factor field indicates the number of
physical sectors between the last logical block of one
cylinder and the first logical block of the next cylinder.
The actual cylinder skew factor that the drive uses depends
on the zone. The default value is 0009H, which is the
cylinder skew factor for the first zone.
Byte 20 The drive type field bits are defined as follows:
The soft sectoring (SSEC) bit is set to 1. This bit is
reported as not changeable. Although it can be set to
satisfy system requirements, it does not affect drive per-
formance.
The hard sectoring (HSEC) bit is set to 0. This bit is
reported as not changeable. Although it can be set to
satisfy system requirements, it does not affect drive per-
formance.
The removable media (RMB) bit is always set to 0, indi-
cating that the drive does not support removable media. This
same bit is also returned in the Inquiry parameters.
The surface map (SURF) bit is set to 0, indicating that the
drive allocates successive logical blocks to all sectors
within a cylinder before allocating logical blocks to the
next cylinder.
Bytes 21--23 Reserved 92
C.4 Rigid Disc Geometry page (04H)
===============================================================
The Rigid Disc Geometry page is shown below. This table summarizes the
function, the default value and the changeability of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (04H)
1 Page length (16H)
2--4 Number of cylinders
changeable 000000H
5 Number of heads
changeable 00H
6--8 Starting cylinder for write precompensation
default 000000H
changeable 000000H
9--11 Starting cylinder for reduced write current
default 000000H
changeable 000000H
12--13 (default) Drive step rate (0000H)
changeable 0000H
14--16 (default) Loading zone cylinder (000000H)
changeable 000000H
17 Reserved RPL
default 0 0
changeable 0 0 0 0 0 0 1 1
18 (default) Rotational offset (00H)
changeable FFH
19 (default) Reserved (00H)
changeable 00H
20--21 Media rotation rate
default 1194H
changeable 0000H
22--23 (default) Reserved (0000H)
changeable 0000H
Bytes 2--4 The number of cylinders field specifies the number of
user-accessible cylinders, including two spare cylinders set
aside for defects. The drive uses the additional cylin-
ders for storing parameters and defect lists or for diagnos-
tic purposes. The number of cylinders is specified on page
1.
Byte 5 The number of heads field specifies the number of read/write
heads on the drive. The number of heads is specified on page
1.
Bytes 6--16 The starting cylinder for reduced write current,
starting cylinder for reduced read current, drive step rate
and loading zone cylinder bytes are not used by the drive.
Byte 17 When the rotational position locking (RPL) bits are 00Bi-
nary, the rotational position locking is changeable. When
the RPL bits are 01Binary, the drive automatically synchro-
nizes its spindle with the synchronized master. When the RPL
bits are 10Binary or 11Binary, the drive is the synchro-
nized-spindle master.
For more information about external spindle-clock synchronization,
see Section 2.11.
Byte 18 The rotational offset is the rotational skew the drive uses
when synchronized. The rotational skew is applied in the
retarded direction (lagging the sync spindle master). A
value of zero means no rotational offset is used.
Byte 19 Reserved.
Bytes 20--21 The medium rotation rate is the spindle speed, which is
specified on page 1.
Bytes 22--23 Reserved.
C.5 Caching page (08H)
===============================================================
The drive uses read look-ahead, read caching and write caching to
improve seek times and performance.
C.5.1 Read look-ahead and read caching
The drive uses an algorithm that improves seek performance by reading
the next logical sectors after the last requested sector. These unre-
quested sectors are read into a buffer and are ready to be transmitted
to the host before they are requested. Beca use these sectors are read
before they are requested, access read time for the sectors is
virtually eliminated. This process is called either read look-ahead or
read caching.
Read look-ahead and read caching are similar algorithms. Read look-
ahead occurs when a Read command requests more data than can be
contained in one buffer segment. Read caching occurs when a Read
command requests less data than can be contained in one b uffer
segment.
The buffer used for read look-ahead and caching can be divided into
segments as shown in the following table. To change the number of
segments, use byte 13 of the Caching page, which is described in
Appendix C.5.3. The default is one, 256-Kbyte segment.
Number of segments Size of segment (in Kbytes)
1 256
2 128
4 64
8 32
16 16
When the buffer is divided into multiple segments, each segment func-
tions as an independent buffer, causing dramatically increased
performance in multitasking and multiuser environments.
C.5.2 Write caching and write merging
===============================================================
Write caching. The drive uses the write segment to store write com-
mands and data. After the drive caches the commands and data, it is
immediately ready to process new commands. The drive writes the data
to the disc at its next convenient opportunity.
Write merging. The drive accepts contiguous write commands and
executes them sequentially as one command.
C.5.3 Caching page description
The Caching page is shown below. This table summarizes the function,
the default value and the changeability of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (08H)
1 Page length (12H)
2 IC ABPF CAP DISC SIZE WCE MF RCD
default 1 0 0 1 0 1 0 0
changeable 1 0 0 0 0 1 1 1
3 Demand read Write retention priority
retention priority
default 0 0 0 0 0 0 0 0
changeable 0 0 0 0 0 0 0 0
4--5 (default) Disable prefetch transfer length (FFFFH)
changeable 0000H
6--7 (default) Minimum prefetch (0000H)
changeable 0000H
8--9 (default) Maximum prefetch (FFFFH)
changeable FFFFH
10--11 (default) Maximum prefetch ceiling (FFFFH)
changeable FFFFH
12 FSW Rsrvd DRA Reserved
default 0 0 0 0 0 0 0 0
changeable 0 0 1 0 0 0 0 0
13 Number of cache segments
default 0 0 0 0 0 0 0 1
changeable 1 1 1 1 1 1 1 1
14--15 (default) Cache segment size (0000H)
changeable 0000H
16 (default) Reserved (00H)
changeable 00H
17--19 (default) Noncache segment size (000000H)
changeable 000000H
Byte 2 The initiator control (IC) bit is not supported.
When the abort prefetch (ABPF) bit is 0, the drive controls
completion of prefetch. See the description for the DISC
bit, below. This is the default value and it is not
changeable.
The caching analysis permitted (CAP) bit is not supported.
When the discontinuity (DISC) bit is 1, the drive may
prefetch across cylinder boundaries, where head seeks
consume additional processing time. This is the default
value and it is not changeable.
The size enable (SIZE) bit is not supported.
When the write cache enable (WCE) bit is 0, the drive
returns a good status for a Write command after successfully
writing all the data to the media. When the WCE bit is 1,
the drive returns a good status for a Write command after
successfully receiving the data and before writing it to the
media.
When the multiplication factor (MF) bit is 0, the drive
interprets the minimum prefetch and maximum prefetch fields
as the number of logical blocks to be prefetched. When the
MF bit is 1, the drive interprets the minimum prefetch and
maximum prefetch fields in terms of a number which, when
multiplied by the transfer length of the current command,
yields the number of logical blocks to be prefetched.
When the read cache disable (RCD) bit is 0, the drive may
return data requested by a Read command by accessing either
the cache or the media. If the RCD bit is 1, the cache is
not used.
Byte 3 The demand read retention priority field is not used. The
initiator cannot assign any special retention priority to
the drive.
The write retention priority field is not used. The
initiator cannot assign any special retention priority to
the drive.
Bytes 4--5 The disable prefetch transfer length always has a value
of FFFFH, which means that the drive attempts an antici-
patory prefetch for all Read commands.
Bytes 6--7 The minimum prefetch field specifies the minimum num-
ber of blocks the drive prefetches, regardless of the delays
it may cause in executing subsequent pending commands.
When the minimum prefetch field contains 0, the drive
terminates prefetching whenever another command is ready to
be executed. If the minimum prefetch equals the maximum
prefetch, the drive prefetches the same number of blocks
regardless of whether there are commands pending.
Bytes 8--9 The maximum prefetch field specifies the maximum num-
ber of blocks the drive prefetches during a Read command
if there are no other commands pending. The maximum prefetch
field represents the maximum amount of data to prefetch into
the cache for any single Read command.
Bytes 10--11 The maximum prefetch ceiling field should be equal to
the maximum prefetch field. The maximum prefetch ceiling and
maximum prefetch fields are the same if the MF bit is 0.
Byte 12 The force sequential write (FSW) bit is not supported.
When the disable read-ahead (DRA) bit is 1, the drive does
not read into the buffer any logical blocks beyond the
addressed logical blocks. When the DRA bit equals 0, the
drive can continue reading logical blocks into the buffer
beyond the addressed logical blocks.
Byte 13 The number of cache segments field determines the number of
segments into which the cache should be divided. Valid
values are 1, 2, 4, 8, 16 and 32.
Bytes 14--15 The cache segment size field indicates the segment size
in bytes. The cache segment size field is valid only when
the SIZE bit is 1.
Byte 16 Reserved.
Bytes 17--19 The noncache segment size field always contains zeros.
This means that the entire buffer is available for caching.
C.6 Control Mode page (0AH)
===============================================================
The Control Mode page is shown below. This table summarizes the
function, the default value and the changeability of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (0AH)
1 Page length (0AH)
2 Reserved RLEC
default 0 0 0 0 0 0 0 0
changeable 0 0 0 0 0 0 0 1
3 Queue algorithm modifier Reserved QErr DQue
default 0 0 0 0 0 0 0 0
changeable 1 1 1 1 0 0 0 1
4 EECA Reserved RAENP UAAENP EAENP
default 0 0 0 0 0 0 0 0
changeable 00H
5 (default) Reserved (00H)
changeable 00H
6--7 (default) Ready AEN hold-off period (0000H)
changeable 0000H
8--9 (default) Busy timeout period (FFFFH)
changeable 0000H
10--11 Reserved (0000H)
changeable 0000H
Byte 2 The RLEC bit is not implemented.
Byte 3 The queue algorithm modifier field is only effective if the
disable queuing bit is zero. When bit 4 in the queue
algorithm modifier field contains one, the drive may use
tagged command queuing to change the order in which it
executes commands. When bit 4 in the queue algorithm
modifier field contains zero, the drive always executes
commands according to the order indicated by the simple
queue tag.
When the disable queuing (DQue) bit is zero, tagged command
queuing is enabled. When the DQue bit is one, tagged command
queuing is disabled.
Byte 4 Not implemented
Byte 5 Reserved
Bytes 6--7 Not implemented
Bytes 8--9 The busy timeout period field contains the maximum
possible value, which means that the drive can remain busy
an unlimited amount of time.
Bytes 10--11 Reserved
C.7 Notch page (0CH)
===============================================================
The Notch page contains parameters that describe the notches. The
table below summarizes the function, default value and the
changeability of each bit.
The drive uses Zone Bit Recording, which means that the outer
cylinders of the disc contain more logical blocks than the inner
cylinders. The cylinders are organized into groups, called zones or
notches. Every logical block is part of a notch. Notches do not
overlap.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (0CH)
1 Page length (16H)
2 ND LPN Reserved
default 1 0 0 0 0 0 0 0
changeable 0 0 0 0 0 0 0 0
3 (default) Reserved (00H)
changeable 00H
4--5 (default) Maximum number of notches (0013H)
changeable 0000H
6--7 (default) Active notch (0000H)
changeable 0 0 0 1 1 1 1 1
8--11 (default) Starting boundary (00000000H)
changeable 00000000H
12--15 (default) Ending boundary (000BB903H)
changeable 00000000H
16--23 (default) Pages notched (0000000000000008H)
changeable 0000000000000000H
Byte 2 The notched drive (ND) bit is always 1, which means the disc
contains notches of different recording densities. For each
supported active notch value, this page defines the starting
and ending boundaries of the notch.
The logical or physical notch (LPN) bit is 0, which means
the notch boundaries are based on the physical parameters
of the logical unit. The cylinder is most significant; the
head is least significant.
Byte 3 Reserved.
Bytes 4--5 The maximum number of notches field indicates the maxi-
mum number of notches supported by the drive.
Bytes 6--7 The active notch field identifies the notch to which
this, and all future Mode Select and Mode Sense commands
refer, until the active notch is changed by a later Mode
Select command. The value of the active notch field must be
greater than or equal to 0 and less than or equal to the
maximum number of notches. An active notch value of 0 means
that current and future Mode Select and Mode Sense commands
refer to the parameters that apply for all notches.
Bytes 8--11 The starting boundary field indicates the beginning of
the active notch if the active notch is not 0, or the
starting boundary of the logical unit if the active notch is
0. This field is ignored by the Mode Select command. When
the LPN bit is 0, the three most significant bytes represent
the cylinder number and the least significant byte
represents the head number.
Bytes 12--15 The ending boundary field indicates the end of the
active notch if the active notch is not 0, or the end of the
logical unit if the active notch is 0. The default is equal
to the end of zone 1.
When the LPN bit is 0, the three most significant bytes
represent the cylinder number and the least significant byte
represents the head number.
Bytes 16--23 The pages notched field contains a bit map of the mode
page codes that indicates which pages may contain dif-
ferent parameters for each notch. When a bit is 1, the
corresponding mode page can contain different parameters
for each notch. When a bit is 0, the corresponding mode page
contains the same parameters for all the notches. The most
significant bit of this field corresponds to page code 3FH
and the least significant bit corresponds to page code 00H.
C.8 Cache Control page (38H)
===============================================================
The Cache Control page is shown below. This table summarizes the
function, the default value and the changeability of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (38H)
1 Page length (0EH)
2 Rsrvd WIE Rsrvd CE Cache table size
default 0 X 0 X X X X X
changeable (00H)
3 (default) Prefetch threshold (00H)
changeable 00H
4 (default) Maximum prefetch (FFH)
changeable 00H
5 (default) Maximum prefetch multiplier (00H)
changeable 00H
6 (default) Minimum prefetch (00H)
changeable 00H
7 (default) Minimum prefetch multiplier (00H)
changeable 00H
8--15 (default Reserved (0000000000000000H)
changeable 0000000000000000H
Byte 2 The cache enable (CE) bit is always the inverse of the RCD
bit in Mode Page 08H.
The write index enable (WIE) bit controls the creation of
cache data on Write commands. If bit 6 is 0, the next
command treats the cache area as empty.
The cache table size field contains the same values as Mode
Page 08H, byte 13, bits 3 through 0.
Byte 3 The prefetch threshold is not implemented. The drive reads
until the buffer is full upon receipt of a Read command.
Byte 4 The maximum prefetch field always contains the same value as
byte 9 of the Caching page. The initiator cannot change this
byte directly.
Byte 5 The maximum prefetch multiplier field always contains the
same value as byte 9 of the Caching page, which is de-
scribed in Appendix C.5.3. The initiator cannot change this
byte directly.
Byte 6 The minimum prefetch field always contains the same value as
byte 7 of the Caching page. The initiator cannot change this
byte directly.
Byte 7 The minimum prefetch multiplier field always contains the
same value as byte 7 of the Caching page. The initiator
cannot change this byte directly.
Byte 8--15 Reserved.
C.9 Soft ID page (Flash memory) (3CH)
===============================================================
The Soft ID page is shown below. This table summarizes the function,
the default value and the changeability of each bit. This page is
saved in flash memory that has a life span of 10,000 writes.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (3CH)
1 Page length (01H)
Soft Soft Param Soft Remote ID 2 ID 1 ID 0
2 ID Parity enable remote S/S
default 0 0 0 0 0 0 0 0
changeable 1 1 1 1 1 1 1 1
Byte 2 When the soft ID bit is 0, the drive ignores ID0, ID1 and
ID2 and uses the SCSI ID jumpers to determine the SCSI ID.
When the soft ID bit is 1, the drive ignores the SCSI ID
jumpers and uses ID0, ID1 and ID2 to determine the SCSI ID.
See Figure 5 on page 21 for jumper settings.
When the soft parity bit is 0, the drive uses the parity
jumper settings to determine whether the drive uses parity.
When the soft parity bit is 1, the drive ignores the parity
jumper settings.
When the soft remote bit is 0, the drive uses the remote
start jumper setting to determine whether remote start is
implemented. When the soft remote bit is 1, the drive
ignores the jumpers and uses the remote S/S bit to determine
whether remote start is implemented.
Byte 2 When the remote S/S bit is 0, the drive spins up after a
delay specified by the spinup delay field (byte 4 of the
Operating page, 00H). When the remote S/S bit is 1, the
drive spins up when it receives the Start Unit command. This
bit is only valid if the soft remote bit is 1.
The ID0, ID1 and ID2 bits are the SCSI ID bits. These bits
are only valid when the soft ID bit is 1.
When the param enable bit is 0, the drive does not check
parity. When the param enable bit is 1, the drive checks
parity. This bit is only valid if the soft parity bit is 1.
C.10 Operating page (Flash memory) (00H)
===============================================================
The Operating page is shown in the table below. This table shows the
function, the default value and the changeability of each bit.
The drive accepts an Operating page of two lengths: two bytes or three
bytes. If the length is two bytes, then byte 4, the spinup delay
field, is not written and is assumed to be unchanged.
In addition to being saved on the media, this vendor-unique page is
saved in flash memory that has a life span of 10,000 writes.
Bits 7 6 5 4 3 2 1 0
Bytes
0 PS (1) Page code (00H)
1 (default) Page length (02H or 03H)
changeable 0 0 0 0 0 0 1 X
2 Usage SSM RSVD ATOFF Reserved
default 1 0 0 0 0 0 0 0
changeable 1 1 0 1 0 0 0 0
3 (default) Rsrvd Device type qualifier (00H)
changeable 00H
4 (default) Spinup delay (00H)
changeable 00H
Byte 2 When the usage bit is 1, a warning message is enabled. When
the write life span of the flash memory is exceeded, a
warning message is generated. See additional sense error
code C2 in Appendix B.3. When the usage bit is 0, the
warning message is disabled. If requested, the flash memory
data and the write counter is updated even after the write
life span is exceeded, but the integrity of the data cannot
be assured.
Byte 2 When the synchronous select mode (SSM) bit is 0, the drive
does not send a synchronous data transfer message unless the
initiator has already issued a synchronous data transfer
message. When the SSM bit is 1, the drive can send a
synchronous data transfer message, even when the initiator
has not sent a synchronous data transfer message.
When the disable unit attention (ATOFF) bit is 0, the drive
generates a unit attention condition during power up. When
the disable unit attention (ATOFF) bit is 1, the drive does
not generate a unit attention condition during power up.
Byte 3 The device type qualifier field is not supported.
Byte 4 The spinup delay field controls the drive when it is not in
the remote mode. When the value is 00H, the drive spins up
without delay. When the value is FFH, the drive delays
spinup to a duration whose value in seconds equals five
times the drive’s SCSI bus ID number. When the value is
between 01H and FEH, the drive delays spinup for the
corresponding decimal duration, in seconds.
Appendix D. Inquiry data
===============================================================
When the initiator issues an Inquiry command, the drive returns either
of the following two types of data, depending on the value in the EVPD
bit in byte 1 of the Inquiry command descriptor block:
- Inquiry data
- Vital product data
Both types of data are discussed in this appendix. The Inquiry command
is described in Section 3.4.9.
D.1 Inquiry data
===============================================================
When the initiator issues an Inquiry command, and the EVPD bit in byte
1 of the Inquiry command descriptor block is 0, the drive returns the
following data. If the EVPD bit in byte 1 of the Inquiry command
descriptor block is 1, see Appendix D.2.
Bit 7 6 5 4 3 2 1 0
Byte
0 Peripheral Peripheral
qualifier device type
0 0 0 0 0 0 0 0
1 RMB Device type modifier
0 0 0 0 0 0 0 0
2 ISO ECMA ANSI version
0 0 0 0 0 0 1 0
3 AENC TrmIOP Response data format
0 0 Resrvd 0 0 1 0
4 Additional length (8FH)
5--6 Reserved (00H)
7 Rel Adr Wbus32 Wbus16 Sync Linked 0 CmdQue Sft Re
8--15 Vendor identification
16--31 Product identification
32--35 Product revision level
36--43 Drive serial number
44--95 Reserved
96--143 Copyright notice
144--147 Servo PROM part number
Byte 0 The peripheral qualifier field contains zero, which means that
the drive is currently connected to the logical unit that is
issuing the Inquiry command. The peripheral device type field
contains zero, which means that the drive is a direct access
device.
Byte 1 The RMB bit is 0, which means the discs are not removable. The
device type modifier is not used.
Byte 2 The ISO version field contains zero, which means that we do
not claim compliance with ISO 9316.
The EMCA version field contains zero, which means that we do
not claim compliance with EMCA-111.
The ANSI version field contains two, which means that the
drive complies with ANSI SCSI-2 standard X3.131-199x.
Byte 3 The asynchronous event notification (AENC) bit is zero, which
means that the drive does not support asynchronous event
notification.
The terminate I/O process (TrmIOP) bit is zero, which means
that the drive does not support the terminate I/O process
message.
The response data format field contains two, which means that
the inquiry data is in standard SCSI-2 format.
Byte 4 The additional length field contains 143, which is the num-
ber of bytes contained in the inquiry data beyond byte 4. This
value represents a total inquiry data length of 148 bytes. If
the allocation length in the CDB of the Inquiry command is
less than 148, the inquiry data is truncated, but the
additional length does not change.
Bytes 5--6 Reserved
Byte 7 The RelAdr bit is one, which means that the drive supports the
relative addressing mode.
The WBUS32 bit is zero, which means that the drive does not
support 32-bit data transfers.
The WBUS16 bit is zero, which means that the drive does not
support 16-bit data transfers.
The SYNC bit is one, which means that the drive supports
synchronous data transfer.
The Linked bit is one, which means that the drive supports
linked commands.
The CmdQue bit is one, which means that the drive supports
tagged command queuing.
The Soft Re bit is zero, which means that the drive responds
to a reset with a hard reset.
Bytes 8--15 The vendor identification field contains "SEAGATE"
in ASCII text.
Bytes 16--31 The product identification field contains the model
num- ber of the drive in ASCII text.
Bytes 32--35 The product revision level field contains the last
four digits of the firmware release number in ASCII.
Bytes 36--43 The drive serial number field contains the serial
number of the drive in ASCII.
Bytes 44--95 These bytes are reserved; they contain only zeros.
Bytes 96--143The copyright notice field contains the following ASCII
string: "Copyright (c) 1993 Seagate. All rights reserved."
Bytes 144--147 The servo PROM part number field is reserved.
D.2 Vital product data pages
===============================================================
When the initiator issues an Inquiry command, and the EVPD bit in byte
1 of the Inquiry command descriptor block is 1, the drive returns
vital product data pages. If the EVPD bit in byte 1 of the Inquiry
command descriptor block is 0, see Appendix D.1.
All vital product data pages contain a 4-byte header, shown below.
Bits 7 6 5 4 3 2 1 0
Bytes
0 Peripheral qualifier Peripheral device type
1 Page code
2 Reserved (00H)
3 Page length
Byte 0 The peripheral qualifier field contains zero, which means that
the drive is currently connected to the logical unit issuing
the Inquiry command.
The peripheral device type field contains zero, which means
that the drive is a direct-access device.
Byte 1 The page code field contains the same value contained in the
page code field in byte 2 of the Inquiry command descriptor
block.
If the page code field contains any of the page codes shown in
the table below, the drive returns the corresponding page. The
available page codes are:
Page code Description
00H Supported vital product data pages
80H Unit serial number page
81H Implemented operating definitions page
C0H Firmware numbers page (vendor-unique)
C1H Date code page (vendor-unique)
C2H Jumper settings page (vendor-unique)
Byte 2 Reserved
Byte 3 The page length field contains the length of the supported
page list.
D.2.1 Unit Serial Number page (80H)
The Unit Serial Number page is shown below. The table summarizes the
function and the default value of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 Peripheral qualifier Peripheral device type
1 Page code (80H)
2 Reserved (00H)
3 Page length (0EH)
4--17 Product serial number
Bytes 4--17 The product serial number field contains the serial
number for the drive in ASCII. If the drive does not return
the serial number, it returns spaces (20H).
D.2.2 Implemented Operating Definition page (81H)
The Implemented Operating Definition page is shown below. The table
summarizes the function and the default value of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 Peripheral qualifier Peripheral device type
1 Page code (81H)
2 Reserved (00H)
3 Page length (05H)
4 SAVIMP Current operating definition
0
5 SAVIMP Default operating definition
0
6--8 SAVIMP Supported operating definition
0
Byte 4 The current operating definition field contains the value of
the current operating definition.
Byte 5 The SAVIMP bit is always zero; therefore, the current
operating definition parameter cannot be saved. If the SAVIMP
bit is one, the current operating parameter can be saved.
The default operating definition field contains the value of
the default operating definition. If no operating definition
is saved, the drive uses the default operating definition.
Bytes 6--8 If the SAVIMP bit is zero, the default definition
parameter cannot be saved. If the SAVIMP bit is one, the
default definition parameter can be saved.
The supported operating definition field contains the value of
the supported operating definition. If no supported oper-
ating definition is saved, the drive uses the default
operating definition.
D.2.3 Firmware Numbers page (C0H)
The Firmware Numbers page is shown below. The table summarizes the
function, and default value of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 Peripheral qualifier Peripheral device type
1 Page code (C0H)
2 Reserved (00H)
3 Page length (10H)
4--7 Download firmware number
8--11 Controller PROM number
12--15 Servo PROM number
16--19 EEPROM image number
Bytes 4--8 The download firmware number field contains the firm- ware
number in ASCII.
Bytes 9--11The controller PROM number field contains the controller
PROM number in ASCII.
Bytes 12--15The servo PROM number field contains the servo PROM in
ASCII.
Bytes 16--19The EEPROM image number field contains the EEPROM image
number in ASCII.
D.2.4 Date Code page (C1H)
The Date Code page is shown below. The table summarizes the function
and the default value of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 Peripheral qualifier Peripheral device type
1 Page code (C1H)
2 Reserved (00H)
3 Page length (03H)
4 Year
5--6 Week
Bytes 4 The year field contains the year, in ASCII, that the firmware
was released.
Bytes 5--6 The week field contains the week, in ASCII, that the
firm- ware was released.
D.2.5 Jumper Settings page (C2H)
The Jumper Settings page is shown below. The table summarizes the
function and the default value of each bit.
Bits 7 6 5 4 3 2 1 0
Bytes
0 Peripheral qualifier Peripheral device type
1 Page code (C2H)
2 Reserved (00H)
3 Page length (01H)
4 Rsrvd MS PE SCSI ID
Byte 4 If the motor start (MS) bit is 1, the remote start enable
jumper is installed on pins 3 and 4 of the options jumper
block. If the MS bit is 0, the remote start enable jumper is
not installed.
If the parity enable (PE) bit is 1, the parity enable jumper
is installed on pins 1 and 2 of the options jumper block. If
the PE bit is 0, the parity enable jumper is not installed.
SCSI ID is the SCSI ID of the drive.
=====Rev=Hist===============
Written with Borland Pascal v6.0 by B.Rudock, R.Dimick and R.Stacy.
Revision History:
7/94 v1.0 Public release.
=====Legal=Disclaimer=======
LICENSE AGREEMENT
Seagate provides the accompanying object code software ("Software")
and nonexclusively licenses its use on the following terms and
conditions. The Software is copyrighted by Seagate. YOU ASSUME FULL
RESPONSIBILITY FOR THE SELECTION OF THE SOFTWARE TO ACHIEVE YOUR
INTENDED PURPOSES, FOR THE PROPER INSTALLATION AND USE. SEAGATE DOES
NOT WARRANT THAT THE SOFTWARE WILL MEET YOUR REQUIREMENTS, THAT THE
SOFTWARE IS FIT FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE
SOFTWARE WILL BE ERROR FREE. SEAGATE EXPRESSLY DISCLAIMS ALL
WARRANTIES, WHETHER ORAL OR WRITTEN, EXPRESSED OR IMPLIED, INCLUDING
WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. IN NO EVENT WILL SEAGATE BE LIABLE TO YOU, YOUR
CUSTOMERS OR OTHER USERS FOR ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL,
SPECIAL OR EXEMPLARY DAMAGES ARISING OUT OF OR IN CONNECTION WITH THE
USE OR INABILITY TO USE THE SOFTWARE.
End of License agreement.
=====Other==================
Available on the Seagate Tech Support BBS (408)438-8771 and many fine
and helpful BBS's around the world:
Specifications and jumper drawings for all Seagate Disc Drives and
Controllers.
Reprints of Installation Guides.
Troubleshooting essays.
FINDTYPE - Utility which displays bios drive type table and matches a
Seagate model to the best drive type. Also prints complete
specifications lists and much more!
FINDINIT - Utility for Seagate controllers and host adapters that have
onboard bios. Queries the system to determine bios memory address and
initiates low-level format.
DESK REFERENCE - Hypertext data system for all Seagate products,
troubleshooting, other OEM phone numbers and much, much more. A must
for dealers who do a fair amount of support for Seagate products.
SEAGATE FORMAT - A lo-level and mid-level formatting utility for AT
systems (286+) which supports MFM, RLL, ESDI and ATA interface drives.
FIND-ATA - An ATA interface identify drive utility. Ask the drive directly
to determine cylinder, head and sectors, Fast-ATA features like Read/Write
Multiple mode, PIO modes, DMA modes and more. Save the data to a file.
Supports Primary and Secondary port addresses.
-=EOF: ASPI-ID.DOC=-