Updated June 18, 1996
________________________________________________________________________
Models 0664-M1H & N1H IBM Hard Disk Drive
________________________________________________________________________
http:\\www.storage.ibm.com\storage\techsup\hddtech\hddtech.htm
The 0664 Models M1H and N1H provide an industry leading 2 GB of
direct access storage in a 3.5" form factor. The drive offers
outstanding performance, reliability and function. Performance
is tuned for multi-user application in which short block reads
and writes dominate.
APPLICATIONS
============
- High-end workstations
- Network Servers
- Mass Storage arrays
FEATURES
========
- 2.0 gigabytes formatted capacity (512 bytes/sector).
- Fast SCSI-2 10 MB/S (50 pin model M1H)
Fast & Wide SCSI-2 20 MB/S (68 pin model N1H).
- 5.22 MB/s media data rate.
- Rotational speed 5400 RPM.
- Average seek time 9.5 ms.
- Magneto resistive heads.
- PRDF data channel (Partial Response Maximum Likelihood with
Digital filter).
- 512 KB multi-segmented data buffer
- Drive supported SCSI terminator power.
- Industry standard mounting.
- Low command overhead.
- ECC on the fly.
- Read Ahead caching
- Write Back caching supported
- Spindle synchronization.
- Differential SCSI adapter option.
- MTBF 750,000 hours.
BENEFITS
========
- Industry leading capacity in 3.5" form factor.*
- Improved interface data rate.
- High data rate across entire disk surface.
- Fast access to data.
- Leading edge areal density 259 Mbits/sq in.*
- Robust data channel for improved data integrity.
- Fast data retrieval in multi-tasking environments.
- Easy integration across multiple platforms.
- Easy installation.
- Improved data throughput.
- Improved performance in arrays.
- Increase SCSI bus length to 25M.
- Industry leading reliability.*
* As at announcement.
ELECTRICAL CONNECTOR LOCATIONS
==============================
Jumper Settings
---------------
The file contains a jumper block with jumper pins as shown
in both Figures 1 and 2. Information on how to select a
particular address for the SCSI device ID, are given in
Figures 3 and 4.
- Electrical Connectors Rear View -
/ ______________________________ /
/ / /
/ / /
/_____________/ /
/ SCSI PIN 1 POWER PIN 1 /
/ | | /
/________________________|_______________|______/
| | | | | | |
| | . . . . . . . . . . . | | | |<--- Power
SCSI ---> | . . . . . . . . . . . | | o o o o|
| |_______________________| \________|
| _____________ |
Option -->|: : : : : . :| |
Jumper | |_____________| _______ ______ |
Block | | | | | | /
| | | | | | /
| | | | | | /
| _______ ______ | /
| | /
|_______________________________________________|/
Figure 1. Options Jumper Block Location for 50 and 68 pin SCSI
/ ______________________________ /
/ / /
/ / /
/_____________/ /
/ /
/ /
/_______________________________________________/
| . . . . . . . . . . . o o o o |
| . . . . . . . . . . . _________ |
| | O O O O |<-----Power
| _____________ \|_______/ |
| |. . . . . .| | |
Option -->|. . . . . . .| SCSI Pin 1 Power Pin 1 |
Jumper | |_____________| | ______ |
Block | ___________________|_ | | | /
|| . . . . . . . . . . | _____ | | | /
SCSI -->| . . . . . . . . . . || | | | | /
||_____________________| _____ ______ | /
| | /
|_______________________________________________|/
Figure 2. Options Jumper Block Location for 50 & 68 pin SCSI Differential
NOTE: The Options Jumper Block is above the SCSI connector for the
Differential models.
50 Pin SCSI Option Jumper Block
______________
Ground Pin ---------- | O A1 B1 O | --------- Bit 0 (LSB)
Ground Pin ---------- | O A2 B2 O | --------- Bit 1
Ground Pin ---------- | O A3 B3 O | --------- Bit 2 (MSB)
Option Pin (Note 1)---- | O A6 | --------- Blank Polarity
Ground Pin ---------- | O A5 B5 O | --------- Auto Start
-Slave Sync ---------- | O A7 B7 O | --------- -Master Sync
-Term Power ---------- | O A8 B8 O | --------- +Term Power
LED Cathode ---------- | O A9 B9 O | --------- LED Anode
______________
NOTE 1: If the Auto Start Shunt is not on, the file starts by SCSI
command only
NOTE 2: Models with 50 pin SCSI connectors do not have B4.
50 Pin Models
_________________________
|Address B1 B2 B3 |
|------- -- -- -- |
| 0 off off off |
| 1 on off off |
| 2 off on off |
| 3 on on off |
| 4 off off on |
| 5 on off on |
| 6 off on on |
| 7 on on on |
|_______________________|
NOTE: Bit is selected when shunt is in place.
Figure 3 Address Determination for 50 Pin SCSI
68 Pin SCSI Option Jumper Block
______________
Ground Pin ---------- | O A1 B1 O | --------- Bit 0 (LSB)
Ground Pin ---------- | O A2 B2 O | --------- Bit 1
Ground Pin ---------- | O A3 B3 O | --------- Bit 2
Ground Pin ---------- | O A4 B4 O | --------- Bit 3 (MSB)
Ground Pin ---------- | O A5 B5 O | --------- Auto Start
Option Pin (Note 1)---- | O A6 | --------- Blank Polarity
-Slave Sync ---------- | O A7 B7 O | --------- -Master Sync
-Term Power ---------- | O A8 B8 O | --------- +Term Power
LED Cathode ---------- | O A9 B9 O | --------- LED Anode
______________
NOTE 1: If the Auto Start Shunt is not on, the file starts by SCSI
command only
68 Pin Models
____________________________
| Address B1 B2 B3 B4 |
| ------- -- -- -- -- |
| 0 off off off off|
| 1 on off off off|
| 2 off on off off|
| 3 on on off off|
| 4 off off on off|
| 5 on off on off|
| 6 off on on off|
| 7 on on on off|
| 8 off off off on |
| 9 on off off on |
| 10 off on off on |
| 11 on on off on |
| 12 off off on on |
| 13 on off on on |
| 14 off on on on |
| 15 on on on on |
|____________________________|
NOTE: Bit is selected when shunt is in place.
Figure 4 Address Determination for 68 Pin SCSI
Other Jumpers for the 50 and 68 Pin SCSI connectors
B5: Auto Start
B6: Option Pin
B7: -Master Sync (Top pin in Fig 3 & 4) -Slave Sync (Bottom Pin)
B8: Terminator Power
B9: LED Anode (Top pin in Fig 3 & 4) LED Cathode (Bottom Pin)
NOTE: In the charts above "off" means the jumper is not in place and
"on" means the jumper is in place.
MODE SELECT OPTIONS
===================
Certain parameters are alterable using the SCSI "Mode Select"
command. This allows certain drive characteristics to be
modified to optimize performance on a particular system.
Refer to the 0664 S10 SCSI Functional Specification for a
detailed definition of Mode Select parameters.
The changeable parameters are:
Block Descriptor
Number of Blocks
Block length
Page 0
QPE (Qualify Post Error)
UQE (Untagged Queuing Enable)
DWD (Disable Write Disconnect)
ASDPE (Additional Save Data Pointer Enable)
CMDAC
RPFAE (Report Predictive Failure Analysis Error)
CPE (Concurrent Processing Enable)
DSN (Disable Synchronous Negotiations)
FRDD (Format and Reassign Degraded Disable)
DPSDP (Data Phase Save Data Pointer)
WPEN (Write Protect Enable)
DRD (Disable Read Disconnect)
LED Mode--allows user to choose function of LED pins
Page 1
AWRE (Automatic Write Reallocation Enable)
ARRE (Automatic Read Reallocation Enable)
TB (Transfer Block)
RC (Read Continuous)
PER (Post Error)
DTE (Disable Transfer on Error)
DCR (Disable Correction)
Read Retry Count
Page 2
Read Buffer Full Ratio
Write Buffer Empty Ratio
Maximum Burst Size
Page 4
RPL (Rotational Position Locking)
Rotational Offset
Page 7
PER
DCR
Page 8
WCE (Write Cache Enable)
MF (Multiplication Factor)
RCD (Read Cache Disable)
Demand Read Retention Priority
Write Retention Priority
Disable Pre-fetch Transfer Length
Maximum Pre-fetch
Maximum Pre-fetch Ceiling
Number of Cache Segments
Page A (hex)
Queue Algorithm Modifier
QErr (Queue Error Management)
DQue (Disable Queueing)
DATA ORGANIZATION
=================
Capacity (All Models)
----------------------
Bytes/ gross formatted logical
logical sectors/ capacity blocks/
block track (bytes) file
- - - - - - - - - - - - - - - - - - - - -
256 160 1,730,936,320 6,761,470
512 94 2,013,716,480 3,933,040
520 92 2,000,611,600 3,847,330
524 92 2,016,000,920 3,847,330
Cylinders
Total cylinders 2870
User cylinders 2857
Tracks/cylinder 15
User bytes/sector 256-744
(even number of bytes only)
User bytes/logical block 256-744
(numbers of bytes evenly divisible by 2 only)
Overhead bytes/sector 104
Sectors/logical block 1 (for 256
less than or equal to
ub/lba less than or equal
to 744)
User bytes/logical block 256-744
(numbers of bytes evenly divisible by 2 only)
Band 1 user cylinders 1,903
spares/cylinder 30
Band 2 user cylinders 954
spares/cylinder 40
Last cylinder extra spares 80
Note: Banding as defined here refers to the number of spare
sectors provided per cylinder to reallocate defective sectors.
Band 2 cylinders are those nearer the inside diameter of the
data surfaces. These have additional spare sectors since
the likelihood of defective sectors is higher in this
region. This feature does not affect the instantaneous media
data rate which is constant across all cylinders.
WARNING: This disk drive can be damaged by electrostatic
discharge, please follow recommended ESD procedures before
unpacking or handling the drive. Ask your dealer for details
if you need assistance.
OPERATING ENVIRONMENT
=====================
The drive operates within its' performance limits when the
following environment is maintained. Product life calculations
are based on the nominal environment for a typical application.
Humidity:
---------
Operating 8% to 90% noncondensing
Storage 5% to 95% noncondensing
Shipping 5% to 100%
(applies at a packaged level)
Wet Bulb Temperature:
---------------------
Operating 80 degrees F (26.7 degrees C) maximum
Shipping/Storage 85 degrees F (29.4 degrees C) maximum
Elevation:
----------
Operating -1,000 to 10,000 feet
(-304 to 3,048 meters)
Shipping/Storage -1,000 to 40,000 feet
(-304 to 12,192 meters)
Temperature:
------------
Operating ambient 41 to 131 degrees F (5 to 55 degrees C)
Operating casting 41 to 140 degrees F (5 to 60 degrees C)
temperature (see note below)
Operating casting Not to exceed 3.6 degrees F (2 degrees C)
temperature delta (see note below)
Shipping -40 to 149 degrees F (-40 to 65 decrees C)
Storage 34 to 149 degrees F (1.1 to 65 degrees C)
Temperature Gradient
--------------------
Operating 18 degrees F (10 degrees C) per hour
Shipping/Storage below condensation
These temperature limits are extremely important and must not
be exceeded at the worst case drive and system operation
conditions with the drive randomly seeking, reading, and
writing.
Note: Measure between top and bottom of disk enclosure.
MODELS
======
The 0664 disk drive is available in 2 different models:
50 50 pin SCSI connector
The 50 pin SCSI connector model offers an
8 bit SCSI bus using the SCSI "A" connector.
68 68 pin SCSI connector
The 68 pin SCSI connector model offers an
8/16 bit SCSI bus using the SCSI "P" connector.
...........................................................
Model SCSI
number Connector Comments
____________________________________________________
M1H 50 pin High performance with Industry
Standard mounting hole Frame
N1H 68 pin High performance with Industry
Standard mounting hole Frame
0664 Disk Drive Models
............................................................
Please Note: The 0664 frame supports Industry Standard
mounting holes on the sides and bottom, as well as IBM's
bottom mounting holes which are common with the old IBM
frame.
User Awareness: The 0664 drive has a new look as compared
to previous 3 1/2" family members from IBM. A piece
of Kapton tape is wrapped around the entire drive, both
the frame and DE. This tape is used as a stiffener to
improve the vibration tolerance of the file.
Differential Models
-------------------
For each model of the 0664 the option of a differential
interface is provided. The differential interface
is provided to the customer by plugging a differential
conversion card onto either of our single-ended models.
DC POWER REQUIREMENT LIMITS
===========================
The following voltage specifications apply at the file
voltage connector. There are no special power on/off
sequencing requirements.
+12 Volt Supply
+/- 5.0% (during run)
-7.0% / +5.0% (during start)
+5 Volt Supply
+/- 5.0%
Power Supply Population Population
Current +5 VDC Notes Means Stand Dev
-------------- ------------- -------------- ----------_
Standby average 0.758 Amps (1) 0.032 Amps
Idle average 1.040 Amps (2) 0.035 Amps
R/W ripple Peak-to-peak 0.37 Amps 0.09 Amps
Power-up Minimum voltage
slew rate:
4.5 V/sec
Power Supply Population Population
Current +12 VDC Notes Means Stand Dev
--------------- ------------- -------------- ----------_
Idle average 0.525 Amps 0.013 Amps
Commutation Pulse height 0.05 Amps 0.015 Amps
Seek average 1 op/sec 0.0088 Amps 0.00012 Amps
Seek peak 1.95 Amps (3) 0.038 Amps
Spin-up 1.5 sec max 2.7 Amps (4) 0.1 Amps
Power-up Minimum voltage
slew rate:
7.4 V/sec
Power Differences for Differential SCSI
---------------------------------------
In addition to the current required by the 0664 file, the
50 pin SCSI Differential Adapter Card requires an additional
0.240A to 0.260A while idle. While reading or writing,
the average additional current is 0.5A with peaks of 1.1A.
At present, the 68 pin SCSI Differential Adapter Cards current
are estimated to use an additional 0.336A to 0.364A while idle
and an average of 0.7A with 1.54A peaks when reading or
writing.
Note 1: The file automatically goes into standby after
1 second of idle. There is not additional command overhead
incurred when coming out of standby mode. The spindle motor
is not shut off during standby.
Note 2: 5 volt current is given with all the termination
power provided by the using system.
Note 3: The idle average, commutation, and seek peak should
be added together to determine the total 12-volt peak current
Note 4: The current at start is the total 12-volt current
required (ie, the motor start current, module current, and
voice coil retract current).
RIPPLE
======
Externally Generated Ripple
---------------------------
(as seen at file power connector)
Voltage Maximum Notes
-------- ------------------- --------
+5 VDC 150 mV peak-to-peak 0-20 MHz
+12 VDC 150 mV peak-to-peak 0-20 MHz
During file start up and seeking, 12-volt ripple is generated
by the file (referred to as dynamic loading). If several
files have their power daisy chained together then the power
supply ripple plus other file's dynamic loading must remain
within the regulation tolerance window of plus/minus 5%.
A common supply with separate power leads to each file is
a more desirable method of power distribution.
To prevent external electrical noise from interfering with
the file's performance, the file's mounting frame may
be electrically isolated from the system mounting frame.
If isolation is not practical then the file's mounting
frame must be within plus/minus 150 millivolts of the
file's power supply ground. At no time should more than
35 milliamps of current be injected into the file frame.
The frequency range that has been tested with this specification
is 0 to 100 MHz.
Hot Plug/Unplug Support
-----------------------
Power supply and SCSI bus hot plug and unplug is allowed.
There is no special sequence required for connecting
5-volt, 12-volt, or ground. During a hot plug-in event
the file being plugged will draw a large amount of
current at the instant of plug-in. This current spike
is due to charging the bypass capacitors on the file.
This current pulse may cause the power supply to go out of
regulation. If this supply is shared by other files then a low
voltage power on reset may be initiated on those files.
Therefore the recommendation for hot plugging is to have
one-supply for each file. Never daisy chain the power
leads if hot plugging is planned. Hot plugging should be
minimized to prevent wear on the power connector.
Hot plugging the SCSI bus may cause glitches on the bus.
To minimize the chance of glitching, it is recommended to
plug in the SCSI bus before the power is applied.
During hot plugging, the supplies must not go over the
upper voltage limit. This means that proper ESD protection
must be used during the plugging event.
ELECTRICAL INTERFACE SPECIFICATIONS
===================================
Power Connector
---------------
The DC power connector used in 0664 is a Molex 8981-4V6.
It is designed to mate with a Molex 8981-4P4 crimp
connector, or a Molex A-70156-2000 insulator displacement
connector, or their equivalent. Pin assignments are
shown in Figure 5.
.....................................................
Pin # 1 2 3 4
_______________________
| _________________ |
| / \ |
| | O O O O | |
| |_________________| |
|_____________________|
+5V GND GND +12V
Figure 5 Power connector pin assignments
.....................................................
50 Pin Signal Connector
-----------------------
0664 50-pin models use a Molex 50-pin connector PN 70246.
This connector is compatible with the ANSI SCSI-2 "A"
connector specifications. It is limited to 8-bit data
transfers only. (Refer to Figure 4 for a rear view of the
0664 50-pin model).
68 Pin Signal Connector
-----------------------
0664 68 pin models use Molex 68-pin connector P/N 15-87-0311.
This connector is compatible with the ANSI SCSI-3 "P"
connector specifications. It can transfer data in
both 8-bit (narrow) and 16-bit (wide) modes. Refer
to Figure 5 for a rear view of the 0664 68-pin model.
Note: The "P" connector is not compatible with the 50-pin
"A" connector as defined in the ANSI SCSI-2 standard.
Therefore, system cables used with 50-pin products cannot be
plugged directly into the 0664 68-pin model.
Despite the difference in connector, the 0664, 68-pin
models are electrically compatible with 0664 50-pin
models and other 50-pin single-ended SCSI products
and therefore can coexist on the same bus. In order to
do so, the differences in connector types would need to be
accounted for in the cable.
SCSI Bus Cable
--------------
The 0664 disk drive uses single-ended drivers and receivers which
will permit cable lengths of up to 6 meters (19.68 feet). It
should be noted, however, that users who plan to use 0664 in
fast mode should follow all of the SCSI-3 guidelines for
single-ended fast operations. This may include a cable length
of less than 6 meters.
The SCSI-2 standard states that any stub from main cable
must not exceed 0.1 meters. This file has a maximum
internal stub length of 0.077 meters on all SCSI signals.
To remain compliant with the standard, the SCSI bus cables
must not add more than 0.023 meters additional stub length
to any of the SCSI signals.
SCSI Bus Terminators
--------------------
0664 has no internal SCSI bus terminators. The system is
responsible for properly terminating the SCSI bus. A
regulated 110 Ohm terminator is recommended for reliable
fast operations (ie, transfer speeds greater than 5M
transfers/sec). Split resistor or regulated terminations
may be used for systems that do not plan fast data transfers.
Some of the terminator possibilities for 0664 are listed
in Figure 6.
SCSI Bus Termination Power
--------------------------
Termination power is optionally provided for systems that
desire to use it. In order to use the 0664 termination
power, the user needs to install a jumper between pins
B8 and A8 of the Options block. The jumper should only
be installed on one device, which should be the last
device on the SCSI bus (ie, the device that is physically
closest to the terminator). 0664 68-pin models can source
up to 2.0 Amps of current at 5.0 Volts (plus/min 5%) for
termination power. 0664 50-pin models can source up
to 1.5 Amps of current at 5.0 Volts (plus/min 5%) for
termination power.
..................................................................
Data | 50-Pin | 68-Pin
Transfer | Model | Model
Rates | Terminators | Terminators
_________________|________________________|_______________________
Less than 5M | Data Mate | Data Mate
transfers/sec | DM500-06-0 | DM2050-02-68S
| Data Mate | Data Mate
| DM500-06-R | DM2050-02-68R
| Data Mate |
| DM2000-02-R |
_________________|________________________|_______________________
More than 5M | Data Mate | Data Mate
transfers/sec | DM500-06-R | DM2050-02-68R
| Data Mate |
| DM2000-02-R |
Figure 6 0664 SCSI Terminators
..................................................................
Recommendations for SCSI Bus Noise Reduction
--------------------------------------------
The SCSI committee has spent a large amount of resource looking
into what needs to be done to assure SCSI devices will work
as specified in the SCSI-2 standard. As a result of this,
the committee is recommending the following approach:
- Using regulated 110 ohm terminator
- Use AWG 28 polyolefin shielded cables
- Make sure data and parity are on the outer ring of the cable
and that REQ and ACK are in the core of the cable
LED Pins
--------
The LED pins (B9/A9 on the options block) can be used to
drive an external LED. The LED cathode should be connected
to pin A9 of the option block, and the LED anode should
be connected to pin B9 of the option block.
The 0664 provided up to 20MA of drive capability.
START AND STOP TIMES
====================
Time Nominal Maximum
-------- ------- --------
Power-Up 2.0 sec 2.4 sec
Start-up 15 sec 1 min
Spin-up 6.7 sec 15 sec
Stop Time 9.0 sec 12.5 sec
Note: BATS is the abbreviation for Basic Assurance Tests.
Start-up sequence spins up the spindle motor, uploads
code, performs BATS2 (verified read/write hardware), resumes
"Reassign in Progress" operations, and more. For more
information on the start-up sequence, refer to the 0664
Interface Specification.
....................................................................
- Bring-up Sequence Times and Stop Time -
Power-up Start-up Sequence
|<---------->|<--------------------------------------------------->|
| Reset, Init| Spin-up Upload BATS2 Reassign, etc. |
| and Test of|<----------->|<-------->|<-------->|<--------------->|
| Controller | | | | |
| | | | | |
| | Motor Start | | Testing | |
| Enable | | | of | |
| SCSI Bus | Init Servo | |Read/write| |
|____________|_____________|__________|__________|_________________|
| | |
| | |
Power-on Auto Start function File ready to accept
enabled or Start Unit Read and Write
command issued at this commands.
time.
....................................................................
Note: If a RESET is issued before the file comes ready
the power on sequence will start again. In all other cases
when a RESET is issued the present state of the motor is
not altered.
MECHANICAL SPECIFICATIONS
=========================
This section details the mechanical specifications of the
IBM OEM 0664 disk drive.
Weight
------
Approximately 1.8 pounds (0.8 kilograms)
Dimensions
---------- U.S. S.I. Metric
-------- ------------
Height 1.63 in 41.3 mm
Width 4.00 in 101.6 mm
Depth 5.75 in 146.0 mm
Depth* 6.61 in 168.0 mm
* Differential model only.
Note: The electrical connectors exceed the stated depth dimensions, see
Figure 7.
Clearances
----------
A minimum of 2mm clearance should be given to the bottom surface except
a 10mm diameter area around the bottom mounting holes. For proper
cooling it is suggested that a clearance of 6mm be provided under the
file and on top of the file.
Note: The top of the drive will not exceed the height dimensions by more
than 2 millimeters during a nonoperating shock.
Mounting
--------
The drive can be mounted with any surface facing down.
The drive is available with both side and bottom mounting holes. Refer
to the Figures 7 and 8 for the location of these mounting holes for each
configuration.
Note: The maximum allowable penetration of the mounting screws is 3.8mm.
The torque applied to the mounting screws must be 1.0 Newton meters
plus/minus 0.1 Newton meters.
.........................................................................
- - - - - - ---------------------------------
Front | | | | Power and
| | | | SCSI connectors
| | ---(6x)6-32 |----
A | | * |
| | v * | |
| B --- | O O O | |
- - - - - - ---------------------------- |
| | | | | |
|-C-|- - -D- - -| | | |
| |- - -E- - - - - - - | | |
|- - - - -F- - - - - - - - - | |
|- - - - -G- - - - - - - - - - - -|
A = 41.30 +/- 0.5 mm NOTE: * Denotes a vent hole.
B = 6.35 +/- 0.5 mm Do not block.
C = 16.00 +/- 0.4 mm
D = 60.00 +/- 0.2 mm
E = 101.60 +/- 0.2 mm
F = 146.00 +/- 0.5 mm
G = 153.20 +/- 1.5 mm
Figure 7 Side View Mechanical Dimensions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- - - - - - ----------------------------
| - - - - | O O |----
Front | | - - | o o | |
| | | | | |SCSI Connector
| (2X)6-32 UNC-2B - - | |
A B C | (2x)M4 - - - - - | |----
| | | |
| | | | v | |----
| | - - | o o v | | Power Connector
| - - - - | O O | |
- - - -|- - ---------------------------------
| | |-F-|- - - G - - -| |
D E |- - - - - H | - I - |
A = 101.60 +/- 0.5 mm
B = 95.24 +/- 0.2 mm
C = 93.00 +/- 0.2 mm
D = 31.80 +/- 0.3 mm
E = 4.30 +/- 0.4 mm
F = 14.20 +/- 0.4 mm
G = 79.50 +/- 0.2 mm
H = 60.33 +/- 0.4 mm
I = 44.45 +/- 0.2 mm
Figure 8 Bottom View Mechanical Dimensions
.........................................................................
WARNING: The file's mounting frame is electrically isolated
from the file's disk enclosure. The disk enclosure is not
at ground potential. Therefore any user mounting scheme must
not result in the disk enclosure being shorted to ground.
PLEASE NOTE: The 0664 frame supports Industry Standard mounting holes on
the sides and bottom, as well as IBM's bottom mounting holes which are
common with the old IBM frame.
PACKAGING: The drive must be protected against electrostatic
discharge especially when being handled. The safest way to
avoid damage is to put the drive in an antistatic bag before
ESD wrist straps etc are removed.
Drives should only be shipped in approved containers, severe
damage can be caused to the drive if the packaging does not
adequately protect against the shock levels induced when
a box is dropped. Consult the dealer if you do not have
an approved shipping container.
VIBRATION AND SHOCK
===================
Operating/Nonoperating Vibration
--------------------------------
Due to the complexity of this subject we recommend that users contact the
distributor to discuss how to perform the required measurements if they
believe this to be an area which requires evaluation.
Operating Shock
---------------
The drive will continue to operate, at the stated "Performance,"
when subjected to a 5 G half sine wave shock pulse of 11
milliseconds duration.
No permanent damage will occur to the drive when subjected
to a 10 G half sine wave shock pulse of 11 milliseconds
duration.
The shock pulses are applied in either direction in each
of three mutually perpendicular axis, one axis at a time.
Nonoperating Shock
------------------
No damage will occur if the unpackaged drive is not
subjected to a square wave shock greater than a
"faired" value of 35 Gs applied to all three axis for a
period of 20 milliseconds, one direction at a time.
Additionally, no damage will occur if the unpackaged drive
is not subjected to an 11 millisecond half sine wave
shock greater than 60 Gs applied to all three axis, one
direction at a time.
File last updated on 01/11/95 by jjm
