Updated June 18, 1996
________________________________________________________________________
Models DORS-31080 & 32160 IBM Hard Disk Drive
________________________________________________________________________
http:\\www.storage.ibm.com\storage\techsup\hddtech\hddtech.htm
The performance characteristics of the DORS family make it ideal for desktop
applications where high performance and capacity are required. The drives
spin at 5400 rpm, have sector servo, PFA (S.M.A.R.T) and a media data rate
of 6-9MB/sec.
APPLICATIONS
------------
- High-end desktop
- Entry workstations
- Low capacity servers and arrays
FEATURES
--------
- 1.08/2.16GB formatted capacity
- Industry standard interface -50 pin ANSI SCSI-2
- 5.93/8.95 MB/s media data rate
- Rotational speed 5400 rpm
- Sustained data rate 3.8 - 5.5 MB/s
- Average seek time 8.5 ms
- Average latency 5.56 ms
- 10 MB/sec data transfer speed
- Magneto resistive heads
- Connection for external activity LED
- Sector servo
- 448 KB multi-segmented dual port data buffer
- On-board SCSI bus terminator
- Industry standard mounting
- Low command overhead
- Read ahead caching
- EEC on the fly
- Write cache support
- Predictive Failure Analysis (S.M.A.R.T. Compliant)
- MTBF 800,000 hours
BENEFITS
--------
- Popular capacity points
- High interface data rate
- High data rate across entire disk surface
- Fast access to data
- Areal density 731 Mbit/sq in. (Max)
- Visibility of Drive Activity
- No thermal recalibration
- Fast data retrieval in multi-tasking environments
- Easy integration across multiple platforms
- Easy installation
- Improved data throughput
CONNECTORS
----------
Pin 1 Pin 1
│ │
│ │
┌════════════════┬─────╔═══│═════════│═══┐
│ │ │ ║ │ │ ││
│ │ │ ║ │ │ ││
│┌────────────┼─┬┴─────────┼─────────┼──┤│
││┌───────────┴─┴──────────┼┐ ╔══════│╗ ││
│││::::::::::::.::::::::::::│ ║o o o o║ ││
││└────────────────────────┼┘ ╚═══════╝ ││
└┴─────────────────────────┼────────────┴┘
SCSI I/F │
Connector │
│
Pin 2
Power ┌──────────────────────────────────────────────┐
Connector ┌┴┐ ──────────────┐ │
│ │ │ │
│ │ │ Back Side of Drive │
│ │ │ │
│ │ │ │
│ │ │ │
│ │ Logic │ │
SCSI/IF │ │ Card │ │
Connector │ │ │ │
│ │ │ │
│ │ │ │
│ │ │ │
│ │ ├─┐──Pins 1,2 │
│ │ │ │ │
│ │ │ │ Option Jumper Block │
│ │ │ │ │
│ │ ├─┘──Pins 23,24 │
└┬┘ ──────────────┘ │
└──────────────────────────────────────────────┘
Bottom of Drive
The DC power connector is designed to mate with AMP part 1-480424 (using
AMP pins P/N 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
╔═══════╗ Pin # 1 - +12V
║O O O O║ 2,3 - GND
╚═══════╝ 4 - +5V
SCSI SIGNAL CONNECTOR
---------------------
The SCSI Signal Connector is a 50 pin connector meeting the ANSI SCSI
specification.
┌──────────────────────────────────────────┐
│ │
│ ┌───────────────────────────┬──────────┐ │
│ │ ......................... │ │ │
│ │ ............ ............ │ O O O O │ │
└─┴───────────────────────────┴──────────┴─┘
Note: It is intended that the hard disk drive should only be in electrical
contact with the chassis of the system 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.
Unit attention Disable
│
│ Reserved
│ │
│ │ Auto start delay
SCSI Terminator on │ │ │
│ │ │ │ Delay start 6/12
Disable Auto Spin Up │ │ │ │ │
│ │ │ │ │ │ Disable SCSI Parity
SCSI ID │ │ │ │ │ │ │
Reserved DAS2 DAS1 DAS0│ │ │ │ │ │ │ LED Cathode
│ │ │ │ │ │ │ │ │ │ │ │
1 3 5 7 9 11 13 15 17 19 21 23
┌──────────────────────────────────────────────────┐
│ o o o o o o o o o o o o │
┌──┘JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9 JP10 JP11 JP12└──┐
│ o o o o o o o o o o o o │
└────────────────────────────────────────────────────────┘
2 4 6 8 10 12 14 16 18 20 22 24
└───┴───┴───┴────┴───┴─┬─┴───┴───┴───┴────┘ │
Ground LED Anode
Jumper Pins Assignment
JUMPER OPTIONS
--------------
SCSI ID (Address) Pins
----------------------
Note: In the address determination tables, 'off' means jumper is not in place
and 'on' means jumper is in place.
-DSA2 -DSA1 -DSA0
JP2 JP3 JP4 Device ID
off off off 0
off off on 1
off on off 2
off on on 3
on off off 4
on off on 5
on on off 6*
on on on 7
*Shipping default ID
Disable auto spin up (JP5)
--------------------------
This jumper controls how the drive starts when power is applied. If the
jumper is NOT installed then the file will spin up automatically after
power-on reset. If the jumper IS installed the file will NOT spin up
unless the host system issues a 'START UNIT' command to the file.
SCSI Terminator On (JP6)
------------------------
When this jumpers is installed, the on-card SCSI bus terminator is enabled.
Unit Attention Disable (JP7)
----------------------------
When this jumper is installed the drive will not generate a Unit Attention
following a Power On Reset (POR) or SCSI Bus Reset. Any pending Unit
Attention conditions will also be cleared at POR or SCSI Bus Reset.
Auto start delay and Delay start (JP9,JP10)
-------------------------------------------
The auto Start Delay and Delay Start pins control when and how the drive can
spin up, with the combination of Auto Spin up option (pin #9).
When in Auto Spin up and Start delay mode the drive start will be delayed by a
period of time multiplied by its own SCSI address. If Auto Spin up is disabled,
these jumpers will be ignored.
Disable Auto Auto
Auto Start Start
Spin up Delay Delay
6/12
JP5 JP9 JP10 Option
-------------------------------------------------------
on Don't Don't Drive will NOT spin up
care care Requires Start Command
-------------------------------------------------------
off off off Spin up immediately
after POR
-------------------------------------------------------
off on off Spin up six seconds
multiplied by SCSI
address after POR
-------------------------------------------------------
off on on Spin up twelve seconds
multiplied by SCSI
address after POR
-------------------------------------------------------
Disable SCSI parity (JP11)
--------------------------
When this jumper is installed, the drive's SCSI parity checking is disabled.
External Activity (LED) pins
----------------------------
The LED pins can be used to drive an external Light Emitting Diode. Up to
8mA of sink current capability is provided. The LED Anode must be tied to
the current limited +5V source provided on Pin # 24 of the Option Jumper Block.
The LED Cathode is then connected to the Pin # 23 to complete the circuit.
Default Setting
---------------
The default jumper setting at shipment is as follows.
Jumpers installed on
JP2 SCSI Address #6
JP3 SCSI Address #6
JP6 SCSI Terminator enabled
Operating Environment
---------------------
Operating Conditions
Temperature 5 to 55 C
Relative Humidity 8 to 90% non-condensing
Maximum Wet Bulb Temperature 29.4 C non-condensing
Maximum Temperature Gradient 15 C/Hour
Altitude -300 to 3000m
Non-operating Conditions
Temperature -40 to 65 C (shipping)
0 to 65 C (storage)
Relative Humidity 5 to 95% non-condensing
Maximum Wet Bulb Temperature 35 C non-condensing
Altitude -300 to 12,000m
Notes:
The system is responsible to provide sufficient air movement to maintain
surface temperature below 60 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. There must be a delay between shock pulses, long
enough to allow the drive to complete all necessary error recovery procedure.
No errors
5G, 11ms half-sine shock pulse
No data loss, seek errors or permanent damage
10G, 11ms half-sine shock pulse
Operating and Non-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.
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 destructively 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
---------------------------------------------------------------------------
Power Supply Ripple
(mV p-p, 0-10MHz) (2) 100 max 150 max
---------------------------------------------------------------------------
Tolerance Supply Current (3) +/- 5% +10%/-8%
---------------------------------------------------------------------------
(Population Mean)
Idle (average) 0.25 0.15/0.20 (A/B)1
R/W (average) 0.30 0.32/0.37 (A/B)1
Seek (average) 0.30 0.32/0.35 (A/B)1
Standby 0.13 0.01
Start up (peak) 0.46 1.10
---------------------------------------------------------------------------
Notes:
1. A/B shows that A is for DPRS-31080 and B is for DORS-32160
2. The maximum ripple is measured at input of the drive.
3. To avoid damage to the file electronics; spikes on the 5V supply must
not exceed 7V and spikes on the 12V supply must not exceed 15V.
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.
There should be no electrical level difference at the four screws position,
and less than +/- 300 millivolts peak to peak difference to the file power
connector ground.
Data Organization
-----------------
Logical Layout DORS 31080 DORS 32160
Bytes per Sector 512 512
Number of Heads 3 5
Number of Disks 2 3
Number of LBAs 2116800 4233600
Total logical Data Bytes 1083801600 2167603200
Signal Definition
-----------------
The pin assignments of interface signals are listed as follows:
PIN Signal PIN Signal
-------------------------------------
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/0
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, which can be controlled
on/off at the drive Option block. The user is responsible for properly
terminating and powering 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 DORS-3xxx Interface
Specification for detailed definition of Mode Select parameters.
The changeable parameters are:
Page 0
Vendor Unique Parameters
QPE - Qualify Posted Errors (0)
UQE - Untagged Queuing Enable (1)
RPFAE - Report PFA Enable (0)
CPE - Concurrent Processing Enable (1)
CAEN - Command Age Limiter Enable (1)
LITF - Idle Time Function (0)
ADC - Adaptive Cache Enable (1)
Command Aging Limit (30h)
QPE - Read threshold (0Ah)
QPE - Write threshold (0Ah)
Page 1
Read-Write Error Recovery Parameters
AWRE - Automatic Write Reallocation Enable (1)
ARRE - Automatic REad Reallocation Enable (1)
TB - Transfer Block (0)
PER - Post Error (0)
DTE - Disable Transfer on Error (0)
DCR - Disable Correction (0)
Read Retry Count (01h)
Correction Span (0)
Write Retry Count (01h)
Page 2
Disconnect/Reconnect Parameters
Read Buffer Full Ratio (00h)
Write Buffer Empty Ratio (00h)
Page 7
Verify Error Recovery Parameters
PER (1)
DCR (0)
Verify Retry Count (01h)
Page 8
Caching Parameters
WCE - Write Cache Enable (1)
RCD - Read Cache Disable (0)
MF - Multiplication Factor (0)
Disable Pre Fetch Transfer Length (0)
Minimum Pre Fetch (0)
Maximum Pre Fetch (0)
Maximum Pre Fetch Ceiling (0)
Number of Cache Segments (7)
Page A
Control Mode Page Parameters
Queue Algorithm Modifier (0h)
QErr - Queue Error (0)
DQue - Disable Queuing (0)
Page 38
Automatic Shutdown Time (0)
Note: (xx) saved options at Shipment
Electromagnetic Compatability
-----------------------------
The Drive meets the following EMC requirements 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'.
European Economic Community directive number 76/889 related to the control
of radio frequency interference and the Verband Deutscher Elektrotechniker
(VDE) requirements of Germany (GOP).
Mechanical Data
---------------
Dimensions
Height 25.4 +/-0.4mm
Width 101.6 +/-0.4mm
Depth 146.0 +/-0.6mm
Weight 570g maximum
Mounting Orientation
The Drive can be mounted in any axis (6 directions)
The maximum allowable penetration of the mounting screws is (1) 3.5mm
(2) 6mm.
Outline Dimensions
------------------
Pin 1
│
┌════════════════┬─┬───╔═══│═════════════┐
│ │ │ ║ │ ││
│ │ │ ║ │ ││
│┌────────────┬─┬┴─┴───────┼────────────┤│
───── ││┌───────────┴─┴──────────┼┐ ╔═══════╗ ││
5.9+/-.5│││:::::::::::::::::::::::::│ ║o o o o║ ││ ─────
───── ││└───────────────────────┼┼┘ ╚═══════╝ ││ 4.7+/-0.5
└┴────────────────────────┼┼────────────┴┘ ─────
2.54+/-0.1 TYP ─┼┤ │ │ │
Pin 2 │ │ ──┼─7.4+/-0.5
│ │ │ │
│ │─┼───┼─(3x)5.08+/-0.1
│ │
│ │
│--32.2+/-0.5-│
25.4+/-0.4 |......101.6 +/- 0.4.......|
|.......|
┌────┐ ┌────────────────────────────┐───
│ ║ │o o│ .
┌──┼────║ │ ┌────────────────────────┐ │ .
│ o│ ║ │ │ ┌──────────────┐│ │ .
├──┘ ║ │ │ │ ││ │ .
│ ┌─╢ │ │ └──────────────┘│ │ .
│ │ ║ │ │ │ │ .
│ │ ║ │ │ │ │ .
│ │ ║ │ └┐ ┌┘ │ .
│ │ ║ │ │ │ │ .
├──┐ └╓╢ │o │ ┌─────────────────┐ └┐o│135.5 +/- 0.4
│ o│ ║║ │ ┌┘ │ │ │ │ .
├──┘ ║║ │ │ │ │ │ │ .
│ ┌╙╢ │ │ │ │ │ │ .
│ │ ║ │ │ │ │ │ │ .
│ │ ║ │ │ │ │ │ │ .
│ │ ║ │ │ │ │ │ │ .
├──┐ │ ║ │ │ └─────────────────┘ │ │ .
│ o│ │ ║ │ \────────────────────────/ │ .
├┬┬┘ │ ║ │o o│ .
│││ └─║ └────────────────────────────┘ ──
└┘└─────┘ │.......101.6 +/- 0.4........│
LEFT FRONT
(4x)6-32UNC (2)
(6x) 6-32 UNC (1) │
┌─────┼┐ ─── . ──┌────────────────────────────┐ │
├─┐ │└┐ . . │o o│ │
├─┤ ┌┼┐│ . . │ ┌────────────────────────┐ │ │
├─┤ │o┼┼──────── . │ │ ┌──────────────┐│ │ │
│ │ └─┘│(2x)16+/-0.2 . │ │ │ ││ │ │
│ │ │ . . . │ │ └──────────────┘│ │ │
║ │ │ . . (2x)60.3│ │ │ │ │
║ │ │ . . +/-0.2│ │ │ │ │
║─┼───┐ │ . . . │ └┐ ┌┘ │ │
║ │ │ └┐── . . │ │ │ │ │
║ └───┘ ┌┘ . ──│o │ ┌─────────────────┐ └┐o┼──┘
║─┐ ┌─┐│(2x)60+/-0.1 . │ ┌┘ │ │ │ │
║ │ │o┼┼──────── (2x)44.45│ │ │ │ │ │
║ │ └─┘│ . +/-0.1│ │ │ │ │ │
║ │ │(2x)41.6+/-0.1 ──│o│ │ │ │o│
║ └─┐┌─┐│ . │ │ │ │ │ │
║ ┌─┘│o┼┼──────── │ │ │ │ │ │
║ │ └─┘└┐ │ │ └─────────────────┘ │ │
║ │ ┌┐ ┌┘ │ \────────────────────────/ │
╚╗┘ ││ │ │o o│
╚═──┘└─┘ └────────────────────────────┘
│ │
(6x)6.35+/-0.2 │.......(2x) 95.25 +/-0.1....│
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Product Description data represents IBM's design objectives
and is provided for comparative purposes; actual results may
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