Updated June 28, 1996
_______________________________________________________________________
Model DJAA-31270 & DJAA-31700 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 two popular capacity
points with AT interface, the drives provide excellent perofrmance
and improved reliability.
APPLICATIONS
------------
* Desktop personal computers
FEATURES BENEFITS
-------- --------
* 1270 and 1700 MB formatted * Generic range of popular storage
capacity (512 byte/sector) capacities
-------------------------------------------------------------------------
* PIO data transfer-mode 4 * Fast interface data rate
(max 16.6MB/s) * Excellent performance on long
-------------------------------------------------------------------------
* DMA data transfer * Excellent performance on long
- Single word: mode 2 records
(max 8.3 MB/s)
- Multi word: mode 2
(max 16.6 MB/s)
-------------------------------------------------------------------------
* Average seek time 12.0ms * Fast access to data
(Read). 13.0 (Write)
* 4500 RPM
-------------------------------------------------------------------------
* 96 KB adaptive sector buffer * Fast data retrieval in single and
multi-tasking applications
* Read ahead of LFU cache algorithm
-------------------------------------------------------------------------
* Industry standard mounting * Ease of installation
* The drive can be counted with any
of its six surfaces facing down
-------------------------------------------------------------------------
* Advanced ECC on the fly (EOF) * Improved data throughput
-------------------------------------------------------------------------
* CHS and LBA addressing modes * Flexibility to support most
appropriate addressing
-------------------------------------------------------------------------
* Power saving modes * Reduced power consumption
-------------------------------------------------------------------------
* Robust design for EMC/RFI * Easy integration across multiple
platforms
-------------------------------------------------------------------------
* MR (Magneto Resistive) * High areal density, low component
head technology count
-------------------------------------------------------------------------
* No ID sector format * More data stored per track,
increased sustained data
transfer rate
-------------------------------------------------------------------------
* MTBF 350,000 hours * Assured reliability
-------------------------------------------------------------------------
CONNECTORS
_________________________________________________________________________
Pin 1 Pin 1 Pin 1
│ │ │
┌──────┼────────────────────────────┼───────────┼─────┐
│ │ │ │ │
│ │ │ │ │
│ │ │ │ │
│ ┌────┼────────────────────────────┼───────────┼───┐ │
│ │┌───┼─┐┌─────────────────────────┼─┐ │ │ │
│ ││ ||| ││ o o o o o o │ ┌───────┼─┐ │ │
│ │└─────┘│ o o o o o o │ │ O O O O │ │ │
└─┴───────┴─────────────────────────┼─┴─┴─────────┴─┴─┘
Power AT I/F │ Power
Connector Connector Pin 2 Connector
┌──────────────────────────────────────────────────┐
Power │ │
Connector┌┴─┐─────┐ │
│ │ ┌─┴┐-JP7 │
│ │ │ │ Option Block │
│ │ │ │ │
│ │ └─┬┘-JP1 Back Side of Drive │
AT I/F │ │ └───────┐ │
Connector│ │ └───────┐ │
│ │ └───────┐ │
│ │ Logic Card └───────┐ │
│ │ └───────┐ │
│ │ │ │
Power └┬─┘ ────────────────────────────────────────────┘ │
Connector │ │
└──────────────────────────────────────────────────┘
There is a choice of 2 power connections to this drive. One DC power
connector is designed to mate with AMP part 1-480424 (using AMP pins
P/N 350078-4). The other (3 pin) DC power connector is designed to mate
with MOLEX 5480-03 (using MOLEX pins 5479). Equivalent connectors may
be used. Pin assignments are shown below, as viewed from the end of
the drive.
3 2 1 Pin # 4 3 2 1
┌────────────┐ ┌─────────────┐
│ ┌┐ ┌┐ ┌┐ │ │ /─────────\ │
│ ││ ││ ││ │ │ │ O O O O │ │
│ └┘ └┘ └┘ │ │ └─────────┘ │
└────────────┘ └─────────────┘
GND +12V +5V +5V GND GND +12V
AT Signal Connector
===================
The drive uses single-ended drivers and receivers. The connector is
designed to mate with 3M part 3417-7000 or equivalent.
┌───────────────────────────────────────────────────────────────┐
│ │
│ ┌───────┬─────────────────────────────────────────┬─────────┐ │
│ │┌┐┌┐┌┐ │ 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 Settings
---------------
Jumpers may be fitted to select the following options:
Pin Numbers
MASTER active 1-2
SLAVE active 3-4
Cable sel 5-6
Reserved 7-8
Write cache 9-10 (Disabled with jumper)
Reserved 11-12
Reserved 13-14
┌─────────────────────────────┐
│ JP1 JP2 JP3 JP4 JP5 JP6 JP7 │
│ │
│ 1 3 5 7 9 11 13 │
│ │
│ 2 4 6 8 10 12 14 │
└─────────────────────────────┘
Write Cache Jumper
------------------
Write cache jumper is checked during the initial POR check.
Write cache is disabled when a jumper is fitted and in this case
a 'Set features' command to switch Write cache 'on' or 'off' will
be aborted by the drive.
Shipping Default Settings
=========================
MASTER is set to on (ie jumper on pins 1-2). No other jumpers
are fitted.
Note:
-----
The jumper positions JP1, JP2, JP3 must not be selected concurrently.
Operating Environment
=====================
Operating Conditions
--------------------
Temperature 5 to 55 degrees C*
Relative Humidity 8 to 90% non-condensing
Maximum Wet Bulb
Temperature 29.4 degrees C non-condensing
Gradient Maximum
Temperature 15 degrees C/Hour
Altitude -300 to 3048m
Non-Operating Conditions
------------------------
Temperature -40 to 65 degrees C
Relative Humidity 5 to 95% non-condensing
Maximum Wet Bulb
Temperature 40 degrees C non-condensing
Altitude -300 to 12,000m
Storage Conditions
------------------
Temperature 0 to 65 degrees C
Relative Humidity 5 to 95% non-condensing
Maximum Wet Bulb
Temperature 40 degrees C non-condensing
Altitude -300 to 13,000m
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. There must be a delay between
shock pulses, long enough to allow the drive to complete all necessary
error recovery procedures.
No errors 5G, 11ms half-sine shock pulse
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
Non-Operating Shock
-------------------
The drive withstands without damage or degradation of performance, a 75G
half-sine wave shock pulse of 11ms duration on six sides when heads are
parked. (When the power is not applied to the unit, the heads are
automatically located in the parked position.) Above specification
is for shocks applied in each direction of the drives three mutually
perpendicular axis, one axis at a time. .
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 drive power connector.
Damage to the drive electronics may result if the power supply cable is
connected or disconnected while power is being applied to the drive (No
hot plug/unplug is allowed). There are inductive loads in the drive
which could cause destructively high voltage spikes on the drive if the
power connection is opened. There is no special power on/off sequencing
required.
Nominal Supply Voltages +5 Volts +12 Volts
Maximum Ripple (0-10 MHz) 100mV p-p 150mV p-p *2
Voltage Supply Tolerance
(incl. ripple) +/-5% +10%/-8% *3
Power Supply Current (Amps)
(Populated Mean)
Idle (average) 0.26 0.12/0.16 (A/B *1)
R/W (average) 0.62 0.24/0.28 (A/B *1)
Seek (average) 0.46 0.34/0.37 (A/B *1)
Standby 0.22 0.02
Start up (peak) 0.64 1.20
Notes:
------
*1 A/B shows that A is for DPEA-30540 and B is for DPEA-30810 and
DPEA-31080.
*2 The maximum ripple is measured at input of the drive.
*3 the drive does not incur damage by an over-voltage condition of +25%
and the maximum duration of 20msec.
During the drive start up and seeking, 12 volt ripple is generated by
the drive (referred to as dynamic loading). If several drives have
their power daisy chained together, then the power supply ripple plus
other drive's dynamic loading must remain within the regulation tolerance
of +10/-8%. A common supply with separate power leads to each drive is
a more desirable method of power distribution.
To prevent external electrical noise from interfering with the drive's
performance, the drive 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 drive power connector ground.
Cabling
=======
The maximum cable length from the Host system to the drive, plus the
circuit pattern length inside the Host systems, must not exceed 18
inches (45.7 cm).
Signal Definition
=================
The pin assignments of interface signals are listed as follows:
===========================================================
PIN Signal I/O PIN Signal I/O
===========================================================
01 -HRESET I 02 GND
-----------------------------------------------------------
03 HD07 I/O 04 HD08 I/O
-----------------------------------------------------------
05 HD06 I/O 06 HD09 I/O
-----------------------------------------------------------
07 HD05 I/O 08 HD10 I/O
-----------------------------------------------------------
09 HD04 I/O 10 HD11 I/O
-----------------------------------------------------------
11 HD03 I/O 12 HD12 I/O
-----------------------------------------------------------
13 HD02 I/O 14 HD13 I/O
-----------------------------------------------------------
15 HD01 I/O 16 HD14 I/O
-----------------------------------------------------------
17 HD00 I/O 18 HD15 I/O
-----------------------------------------------------------
19 GND (20) Key
-----------------------------------------------------------
21 DMARQ O 22 GND
-----------------------------------------------------------
23 -HIOW I 24 GND
-----------------------------------------------------------
25 -HIOR I 26 GND
-----------------------------------------------------------
27 HIORDY O 28 CSEL I
-----------------------------------------------------------
29 -DMACK I 30 GND
-----------------------------------------------------------
31 HIRQ O 32 -HIOCS16 O
-----------------------------------------------------------
33 HA01 I 34 -PDIAG I/O
-----------------------------------------------------------
35 HA00 I 36 HA02 I
-----------------------------------------------------------
37 -HCSO I 38 -HCS1 I
-----------------------------------------------------------
39 -DASP I/O 40 GND
---------------------------------------------------------
Note:
-----
"O" designates an output from the Drive.
"I" designates an input to the Drive.
"I/O" designates an input/output common.
Interface
=========
This data sheet describes some aspects of the host interface to ATA
drives. The interface conforms to the CAM draft proposal for an AT
attachment with certain limitations described below.
Automatic Power Down Sequence
-----------------------------
A hard reset will disable the automatic power down sequence.
Format Track
------------
A drive will not perform a physical format. Instead, it will simply
write a data pattern of all zeros to the sectors which have been
specified by the Format Track command. LBA mode for format track is
not supported.
Format Track Interleave Factor
------------------------------
The drive only supports an interleave factor of 1:1, and may ignore
any other specified interleave, without returning an error.
Write long
----------
Write long command should be executed for the same sector after Read
long command execution. Otherwise, unexpected ECC correctable error
may occur, because of the limitation of the emulation technique to
support 4 byte ECC mode which is implemented in the drive.
Seek Overlap
------------
The drive will wait for the seek to complete before interrupting the
host. Therefore, no seek overlap can occur. This will be transparent
to the host except that performance may be degraded in certain
environments where the host could perform other work while waiting
for seek complete, such as multi-tasking operating systems.
Sleep mode
----------
During Sleep mode the drive will be activated by any command, including,
but not limited to, a soft reset.
Drive/Head Register
-------------------
Bits 5 and 7 of Drive/Head Register are not written to 0. (These 2 bits
are always read as '1' even after host writes to '0'...).
Data Organization
=================
Logical Layout DPEA DPEA DPEA DPEA
-30540 -30540 -30540 -30540
(Chipped) (Chipped) (Chipped) (Chipped)
Number of Heads 16 16 16 16
Number of Sectors/Track 63 63 63 63
Number of Cylinders 1024 1050 1574 2100
Sector Size 512 512 512 512
Sector Number for default CHS 1,032,192 1,058,400 1,586,592 2,116,800
Sector Number for LBA 1,058,496 1,058,496 1,586,664 2,116,992
Usable Bytes for default CHS 528MB 541MB 812MB 1083MB
Usable Bytes for LBA 541MB 541MB 812MB 1083MB
The following Commands are supported by the Drive:
Commands (HEX)
-------- -----
Check Power Mode (E5)
Execute Drive Diagnostics (90)
Format Track (50)
Identify Drive (EC)
Idle (E3)
Idle Immediate (E1)
Initialize Drive Parameters (91)
Read Buffer (E4)
Read DMA (retry) (C8)
Read DMA (no retry) (C9)
Read Long (retry) (22)
Read Long (no retry) (23)
Read Multiple (C4)
Read Sectors (retry) (20)
Read Sectors (no retry) (21)
Read Verify Sectors (retry) (40)
Read Verify Sectors (no retry) (41)
Recalibrate (1X)
Seek (7X)
Set Features (EF)
Set Multiple (C6)
Sleep (E6)
Standby (E2)
Standby Immediate (EO)
Write Buffer (E8)
Write DMA (retry) (CA)
Write DMA (no retry) (CB)
Write Long (retry) (32)
Write Long (no retry) (33)
Write Multiple (C5)
Write Sectors (retry) (30)
Write Sectors (no retry) (31)
Write Verify (3C)
Mechanical Data
===============
Dimensions
----------
Height 25.4+/-0.4mm
Width 101.6+/-0.4mm
Depth 146.0+/-0.6mm
Weight 530g 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.
The recommended mounting screw torque is 3+/-0.5[KgF.cm]
─── ┌────────────────────────────────────────────────┐
| │ │
25.4mm │ (6X) UNC 6-32 │
+/- 0.4 │ o o o (*1) ┌───┘
─── └────────────────────────────────────────────┘ ──6.35+/-0.1mm
|---|--- 60mm --------|--- 41.6mm ----|
16mm
|---------------- 146 +/-0.6mm --------------------|
|---------------- 135.5 +/- 0.4 -----------------|
- ┌────────────────────────────────────────────────┐
| │ o o │
| │ (4X) UNC6-32 (*2) ┌┴─┐
Rear | │ │ │ Front
| │ │ │
| │ │ │
| │ │ │
| │ │ │
101.6mm│ │ │
+/- 0.4│ │ │
| │ │ │
| │ │ │
| │ │ │
| │ └┬─┘
| │ o o │
- └────────────────────────────────────────────────┘
|----- 60.3mm ----|------ 44.4mm -----|
Registers
=========
Address Input Register Output Register
------- -------------- ---------------
1F0h Data Data
1F1h Error Features
1F2h Sector Count Sector Count
1F3h Sector Number Sector Number
*LBA bits 0-7 *LBA bits 0-7
1F4h Cylinder Low Cylinder Low
*LBA bits 8-15 *LBA bits 8-15
1F5h Cylinder High Cylinder High
*LBA bits 16-23 *LBA bits 16-23
1F6h Drive/Head Drive/Head
*LBA bits 24-27 *LBA bits 24-27
1F7h Status Command
3F6h Alternate Status Device Control
3F7h Drive Address Not Used
The host uses the register interface to communicate to and from the
drive. The registers are accessed through the host port addresses
shown.
The host should not read or write any registers when the Status Register
BSY bit = 1.
Note:
-----
* Meaning of Register contents when LBA addressing mode used.
Electromagnetic Compatibility
=============================
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 (EEC) directive #76/889 related to the
control of radio frequency interference and the Verband Deutscher
Elektrotechniker (VDE) requirements of Germany (GOP).
WARNING:
========
This disk drive can be damaged by Electro-Static Discharge; please follow
recommended ESD procedures before unpacking or handling the drive. Ask
your Dealer for details if you need assistance.
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 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 your
IBM marketing representative if you do not have an approved shipping
container.
----------------------------------------------------------------------
AMP is a trademark of AMP Incorporated.
Molex is a trademark of Molex Incorporated.
DATA MATE 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.
-----------------------------------------------------------------------
