Updated June 18, 1996
________________________________________________________________________
Models DSAS-3270, DSAS-3360, DSAS-3540 & DSAS-3720 IBM Hard Disk Drive
________________________________________________________________________
http:\\www.storage.ibm.com\storage\techsup\hddtech\hddtech.htm
IBM OEM has introduced a new range of disk drives for the desktop
personal computer marketplace. Available in four popular capacity points
with SCSI-2 FAST interface, the drives provide excellent performance and
improved reliability.
APPLICATIONS
============
- Desktop personal computers
- Low-end file servers
- Low-end workstations
FEATURES BENEFITS
===============================================================================
- 281, 365, 548, and 730 MB - Generic range of popular storage
formatted capacity (512 byte/sector) capacities
-------------------------------------------------------------------------------
- 10 MB/s data transfer speed - Fast interface data rate
-------------------------------------------------------------------------------
- 44.5 Mb/s (OD)media data rate - Excellent performance on long
32.5 Mb/s (ID) media data rate records
-------------------------------------------------------------------------------
- Average seek time 12ms (Read) - Fast access to data
- 4500 RPM
-------------------------------------------------------------------------------
- 192 KB segmented buffer - Fast data retrieval in
(option 96 KB) multi-tasking applications
- Read ahead caching with LFU
(Least Frequently Used)
segment update
-------------------------------------------------------------------------------
- Industry standard mounting - Ease of installation
- The drive can be mounted with any of
its six surfaces facing down
-------------------------------------------------------------------------------
- Enhanced ECC implementation - Improved data throughput
-------------------------------------------------------------------------------
- Power saving modes - Reduced power consumption
-------------------------------------------------------------------------------
- Robust design for EMC/RFI - Easy integration across multiple
platforms
-------------------------------------------------------------------------------
- MR (Magneto Resistive) head - High area density, low component
technology count
-------------------------------------------------------------------------------
- MTBF 300,000 hours - Assured reliability
-------------------------------------------------------------------------------
CONNECTORS
==========
Pin 1
| \
┌────────────────────────────────────────|───────\────┐
│ | \ │
│ | \ │
│┌───────────────────────────────────────|─┬───────|─┐│
││ o o o o o o o o o o o o o o o o o o o o │/ |\││
││ o o o o o o o o o o o o o o o o o o o │ O O O O ││
└┴───────────────────────────────────────|─┴─────────┴┘
SCSI I/F Connector |
Pin 2
┌─────────────────────────────────────┐
Power ┌┴┐ ─────┐ Back Side of Drive │
Connector │ │ ┌┴┐-JP7 │
│ │ │ │Option Block │
SCSI I/F │ │ └┬┘-JP1 │
Connector │ │ \─── │
│ │ \─── │
│ │ \─── │
│ │ \─── │
│ │ \─── │
│ │ \──┐ │
│ │ Logic Card │ │
└┬┘ ────────────────────────────┘ │
└─────────────────────────────────────┘
The DC power connector is designed to mate with AMP part 1-480424
(using AMP pins PN 350078-4). Equivalent connectors may be used.
Pin assignments are shown below, as viewed from the end of the drive.
Pin # 4 3 2 1
┌───────────┐
│/─────────\│
││ O O O O ││
│└─────────┘│
└───────────┘
+5V GND GND +12V
SCSI SIGNAL CONNECTOR
=====================
The SCSI Signal Connector is a 50-pin connector meeting the ANSI SCSI
specification.
┌─────────────────────────────────────────────────────┐
│ │
│ │
│┌─────────────────────────────────────────┬─────────┐│
││ o o o o o o o o o o o o o o o o o o o o │/ \││
││ o o o o o o o o o o o o o o o o o o o │ O O O O ││
└┴─────────────────────────────────────────┴─────────┴┘
NOTE: It is intended that the hard disk drive should only be in
electrical contact with the chassis of the PC at a designated set of
mounting holes. Other electrical contact may degrade error rate
performance. As a result of this it is recommended that there should be
no metal contact to the hard disk drive except at the mounting holes or
the side rails into which the mounting holes are tapped.
OPTION BLOCK
============
Jumper Setting
--------------
Jumper position and function are as shown below.
Pin pitch is 2mm.
The jumpers control SCSI Device ID, Auto Spin Up, Unit Attention, SCSI
Terminator Connection, and Target Initiated Synchronous Negotiation.
Disable Disable
Unit TI
Device ID Attention Negotiation
┌───┼───┐ │ │
┌──│───│───│───────────│───│──┐
│ JP1 JP2 JP3 JP4 JP5 JP6 JP7 │
│ │
│ 1 3 5 7 9 11 13 │
│ │
│ 2 4 6 8 10 12 14 │
└──────────────│───────│──────┘
│ │
Disable Terminator
Auto Connect
Spin Up
NOTES:
1. The jumper position of JP1, 2, and 3 define SCSI ID of the drive.
╔═══╤═══╤════╤═════════╗
║JP1│JP2│JP3 │ SCSI ID ║
╠═══╪═══╪════╪═════════╣
║ 0 │ 0 │ 0 │ 0 ║ Default
╟───┼───┼────┼─────────╢
║ 1 │ 0 │ 0 │ 1 ║
╟───┼───┼────┼─────────╢
║ 0 │ 1 │ 0 │ 2 ║
╟───┼───┼────┼─────────╢
║ 1 │ 1 │ 0 │ 3 ║
╟───┼───┼────┼─────────╢
║ 0 │ 0 │ 1 │ 4 ║
╟───┼───┼────┼─────────╢
║ 1 │ 0 │ 1 │ 5 ║
╟───┼───┼────┼─────────╢
║ 0 │ 1 │ 1 │ 6 ║
╟───┼───┼────┼─────────╢
║ 1 │ 1 │ 1 │ 7 ║
╚═══╧═══╧════╧═════════╝
2. If JP4 is Off, the drive will spin up automatically after power on
reset. If JP4 is On, the drive will not spin up unless the host
system issues a start command to the drive.
3. If JP5 is On, Unit Attention after power on reset or SCSI bus reset
is disabled.
4. If JP6 is On, the internal SCSI terminator works.
5. If JP7 is On, Target Initiated Synchronous Negotiation is disabled,
and then the Initiator is required to start a negotiation handshake
if Synchronous SCSI transfers are desired.
DEFAULT SETTING
===============
The default jumper setting at shipment is as follows.
JP1 JP2 JP3 JP4 JP5 JP6 JP7 Position:
1-2 3-4 5-6 7-8 9-10 11-12 13-14 Pin:
────────────────────────────────────────
OFF OFF OFF OFF OFF OFF OFF Jumper:
│ │ │ │ │ │ │
│ │ │ │ │ │ └─── TI Sync Nego Enabled
│ │ │ │ │ └───────── SCSI Terminator ON
│ │ │ │ └─────────────── Unit Attention Enabled
│ │ │ └───────────────────── Auto Spin Up Enabled
│ │ └─────────────────────────── \
│ └────────────────────────────────── SCSI Device ID = 0
└─────────────────────────────────────── /
OPERATING ENVIRONMENT
=====================
Operating Conditions
--------------------
Temperature 5 to 55 degrees C
Relative Humidity 8 to 90% noncondensing
Maximum Wet Bulb
Temperature 29.4 degrees C noncondensing
Maximum Temperature
Gradient 20 degrees C/hour
Altitude -300 to 3048m
Nonoperating Conditions
-----------------------
Temperature -40 to 65 degrees C
Relative Humidity 5 to 95% noncondensing
Maximum Wet Bulb
Temperature 40 degrees C noncondensing
Maximum Temperature
Gradient 20 degrees C/hour
Altitude -300 to 12,000m
NOTE: The system is responsible to provide sufficient air movement to
maintain surface temperature below 60 degrees C at the center of top
cover of the drive.
Operating Shock
---------------
The hard disk drive meets the following criteria while operating in
respective conditions described below. The shock test consists of five
shocks inputs in each axis and direction for total of 30. There must be
a delay between shock pulses, long enough to allow the drive to complete
all necessary error recovery procedure.
No Data Loss, Seek Errors or Permanent Damage
---------------------------------------------
10G, 11ms half-sine shock pulse
No Data Loss or Permanent Damage
--------------------------------
15G, 5ms half-sine shock pulse
30G, 4ms half-sine shock pulse
Operating Vibration
-------------------
Due to the complexity of this subject we recommend that users contact the
IBM technical support group representative to discuss how to perform the
necessary measurements if they believe this to be an area which requires
evaluation.
DATA ORGANIZATION
=================
Logical Layout DSAS-3270 DSAS-3360 DSAS-3540 DSAS-3720
Number of Heads 2 2 3 4
Number of LBAs 549504 713472 1070496 1427328
Sector Size 512 512 512 512
Total Customer 281 MB 365 MB 548 MB 730 MB
Usable Data Bytes
DC POWER REQUIREMENTS
=====================
The following voltage specifications apply at the file power connector.
Damage to the file electronics may result if the power supply cable is
connected or disconnected while power is being applied to the file (no
hot plug/unplug is allowed). There are inductive loads in the file
which could cause destructive high voltage spikes on the file if the
power connection is opened. There is no special power on/off sequencing
required.
Nominal Supply Voltages +5 Volts +12 Volts
Maximum Ripple
(0-20MHz) 100 mV p-p 100 mV p-p
Voltage Supply
Tolerance
(incl ripple) +/- 5% +10%/-8%
Power Supply
Current (Amps) +5 Volts +12 Volts
Start Peak 0.55 1.10
Idle Average 0.21 0.14
R/W Average 0.44 0.20
Seek Average 0.38 0.29
During the 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 of
+10/-8%. 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 must be held by four screws in a user system
frame which has no electrical level deference at the four screws
position, and has less than +/-300 millivolts peak to peak level
deference to the file power connector ground.
SIGNAL DEFINITION
=================
The pin assignments of interface signals are listed as follows:
PIN Signal Name PIN Signal Name
────────────────────────────────────────────────
01 Ground 02 -DB(0)
────────────────────────────────────────────────
03 Ground 04 -DB(1)
────────────────────────────────────────────────
05 Ground 06 -DB(2)
────────────────────────────────────────────────
07 Ground 08 -DB(3)
────────────────────────────────────────────────
09 Ground 10 -DB(4)
────────────────────────────────────────────────
11 Ground 12 -DB(5)
────────────────────────────────────────────────
13 Ground 14 -DB(6)
────────────────────────────────────────────────
15 Ground 16 -DB(7)
────────────────────────────────────────────────
17 Ground 18 -DB(P)
────────────────────────────────────────────────
19 Ground 20 Ground
────────────────────────────────────────────────
21 Ground 22 Ground
────────────────────────────────────────────────
23 Ground 24 Ground
────────────────────────────────────────────────
25 Open 26 TRM Power
────────────────────────────────────────────────
27 Ground 28 Ground
────────────────────────────────────────────────
29 Ground 30 Ground
────────────────────────────────────────────────
31 Ground 32 -ATN
────────────────────────────────────────────────
33 Ground 34 Ground
────────────────────────────────────────────────
35 Ground 36 -BSY
────────────────────────────────────────────────
37 Ground 38 -ACK
────────────────────────────────────────────────
39 Ground 40 -RST
────────────────────────────────────────────────
41 Ground 42 -MSG
────────────────────────────────────────────────
43 Ground 44 -SEL
────────────────────────────────────────────────
45 Ground 46 -C/D
────────────────────────────────────────────────
47 Ground 48 -REQ
────────────────────────────────────────────────
49 Ground 50 -I/O
────────────────────────────────────────────────
SCSI CABLE
==========
The disk drive uses single-ended drivers and receivers which will permit
cable lengths of up to 6 meters (19.68 feet). For a single ended cable
a 50 conductor flat cable or a 25 signal twisted cable can be used with
a maximum length of 6.0 meters, and a stub length not exceeding 0.1 meters.
SCSI BUS TERMINATOR
===================
The file has an internal Active SCSI bus terminator, and can be
controlled on/off with one jumper block provided at the card edge.
The user is responsible for properly terminating and empowering the SCSI
bus in the using system.
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 DSAS-3XXX Interface
Specification for a detailed definition of Mode Select parameters.
The changeable parameters are:
Page 0
======
Vendor Unique Parameters
------------------------
DPC - Disable Parity Checking (0)
Page 1
======
Read-Write Error Recovery Parameters
------------------------------------
TB - Transfer Block (0)
PER - Post Error (O)
DTE - Disable Transfer on Error (0)
DCR - Disable Correction (0)
Read Retry Count (01h)
Write Retry Count (01h)
Page 2
======
Disconnect/Reconnect Parameters
-------------------------------
Read Buffer Full Ratio (0C0h)
Write Buffer Empty Ratio (0C0h)
Page 7
======
Verify Error Recovery Parameters
--------------------------------
PER (0)
DCR (0)
Verify Retry Count (01h)
Page 8
======
Caching Parameters
------------------
WCE - Write Cache Enable (1)
RCD - Read Cache Disable (0)
Number of Cache Segments
Page A
======
Control Mode Page Parameters
----------------------------
Queue Algorithm Modifier (0)
QErr - Queue Error (01h)
DQue - Disable Queuing (0)
Page D
======
Power Condition
---------------
Standby (1)
Standby Timer (1A5EOh [3 hrs])
MECHANICAL DATA
===============
Dimensions
----------
Height 25.4 +/-0.4mm
Width 101.6 +/-0.4mm
Depth 146.0 +/-0.6mm
Weight 530 g maximum
Mounting Orientation
--------------------
The Drive can be mounted in any axis (6 directions).
|---------------- 146 ----------------|
┌─────────────────────────────────────┐───
┌┴┐ ─────┐ o o │ |
│ │ ┌┴┐ (4X) │ |
│ │ │ │ UNC 6-32 *2 │ |
Front │ │ └┬┘ │ | Rear
│ │ \─── │ |
│ │ \─── │ |
│ │ \─── │ 101.6
│ │ \─── │ |
│ │ \─── │ |
│ │ \──┐ │ |
│ │ │ │ |
└┬┘ ───────o─────────────o──────┘ │ |
└─────────────────────────────────────┘───
|---- 44.4 ---|--- 60.3 ----|
┌──────────────────────────────────────┐
└┐ (6X) UNC 6-32 *1 │
│ o o o │
└─────────────────────────────────────┘
|--- 41.6 --|------ 60 -----|16-|
The maximum allowable penetration of the mounting screws is 1 3.5 mm
2 6 mm.
ELECTROMAGNETIC COMPATABILITY
=============================
The Drive meets the following EMC requiements when installed in the user
system and exercised with a random accessing routine at maximum data
rate: United States Federal Communication Commission (FCC) Rules and
Regulations Part 15, Subject J -Computer Devices "Class B Limits".
Eurpoean Economic Community (EEC) directive #76/889 related to the
control of radio frequency interference and the Verband Deutscher
Elektrotechniker (VDE) requirements of Germany (GOP).
AMP is a trademark of AMP Incorporated.
This data sheet is not a substitute for the full product specification,
which should be used when detailed information is required.
Product Description data represents IBM's design objectives and is
provided for comparative purposes; actual results may vary based on a
variety of factors. This product data does not constitute a warranty.
Questions regarding IBM's warranty terms or methodology used to derive
this data should be referred to your IBM OEM representative. Data
subject to change without notice.
PACKAGING: The drive must be protected against Electro-Static Discharge
especially when being handled. The safest way to avoid damage is to
put the drive in an anti-static bag before ESD wrist straps, etc are
removed.
Drives should only be skipped 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 your
IBM marketing representative if you do not have an approved shipping
container.
