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IBM OEM STORAGE PRODUCTS DSAA-3270,
DSAA-3360, DSAA-3540 & DSAA-3720
IBM OEM has introduced a new range of disk drives for the desktop personal computer
marketplace. Available in four popular capacity points with AT interface, the drives provide
excellent performance and improved reliability.
Applications
Desktop personal computers
Low end file servers
Features
281, 365, 528, and 730 MB formatted capacity (512 byte/sector)
8.3 MB/s interface data rate
44.5 Mb/s (OD) media data rate
32.5 Mb/s (ID) media data rate
Average seek time 12 ms (Read)
4500 RPM-
96 KB three segment buffer (option 224 KB)
Read ahead caching with LFU (Least frequently used) segment update
Industry standard mounting
The drive can be mounted with any of its six surfaces facing down
ECC on the fly
CHS and LBA addressing modes
Power saving modes
Robust design for EMC/RFI
MR (Magneto Resistive) head technology
MTBF 300,000 hours
Benefits
Generic range of popular storage capacities
Fast interface data rate
Excellent performance on long records
Fast access to data
Fast data retrieval in multi-tasking applications
Ease of installation
Improved data throughput
Flexibility to support most appropriate addressing
Reduced power consumption
Easy integration across multiple platforms
High area density, low cmponent count
Assured reliability
PIN 1
Power AT I/F Power
Connector Connector Connector
PIN 2
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 PN 1-480424 (using AMP pins PN 350078-4). The other (3 pin) DC power
connector is designed to mate with MOLEX 5480-03 (using MOLEX pins 5479). Equivalent
3 2 1 Pin# 4 3 2 1
+5V +12V GND +5V GND GND +12V
connectors may be used. Pin assignments are shown below, as viewed from the end of the drive.
AT Signal Connector
The drive uses single-ended drivers and receivers. The connector is designed to mate with 3M
PN 3417-7000 or equivalent.
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
JP1 JP2 JP3 JP4 JP5 JP6 JP7
1 3 5 7 9 11 13
2 4 6 8 10 12 14
Jumpers may be fitted to select the following options:
Pin Numbers
MASTER active 1-2
SLAVE active 3-4
Cable set 5-6
Write cache 9-10 (Disabled with jumper)
Auto reallocation 11-12 (Disabled with jumper)
Auto Reallocation Jumper
Auto reallocation jumper is checked during the initial power on reset (POR) check. Write cache
is disabled when a jumper it fitted. (+) Auto reallocations jumper position needs to be OPEN
when a user system wants to use write cache.
Note:
Auto reallocation only operates, and is mandatory, during write cache operations. Disabling
either function by jumper disables both.
Write Cache Jumper
Write cache jumper is checked during the initial POR check. Write cache is disabled when a
jumper is fitted.
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.
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.
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
Maximum Temperature
Gradient 20 degrees C/Hour
Altitude -152 to 3048 m
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
Maximum Temperature
Gradient 20 degrees C/Hour
Altitude -300 to 12000 m
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 ten shocks inputs in each axis and direction for total of 60.
There must be a delay between shock pulses, long enough to allow the drive to complete all
necessary error recovery procedure.
No errors
5 G, 11 ms half-sine shock pulse
No data loss, seek errors or permanent damage
10 G, 11 ms half-sine shock pulse
No data loss or permanent damage
15 G, 5 ms half-sine shock pulse 30 G, 4 ms 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 a area which requires evaluation.
Data Organization
Logical Layout DSAA DSAA DSAA DSAA
-3270 -3360 -3540* -3720
Number of Heads 16 16 16 16
16*
Number of
Sectors/Track 36 48 63 63
63*
Number of
Cylinders 954 929 1062 1416
1024
Sector size 512 512 512 512
512*
Total Customer 549,504 713,472 1,070,496 1,427,328
Usable Data Sectors 1,032,192*
Total Customer 281 MB 365 MB 548 MB 730 MB
Usable Data Bytes 528 MB*
Note:
*2 versions of DSAA-3540
DC Power Requirement Limits
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
Maximum Ripple
(0-20 MHz) 100 mV p-p 100 mV p-p
Voltage Supply
Tolerance + or - 5% +10%/-8%
(include Ripple)
Power Supply
Current (Amps) +5 Volts +12 Volts
Start peak 0.5 1.10
Idle average 0.19 0.14
R/W average 0.32 0.14
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 + or - 300 millivolts peak to peak level deference to the file
power connector ground.
Signal DefinitionThe 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
29 -DMACK I 30 GND
31 HIRQ O 32 -HIOCS16 O
33 HAOI I 34 -PDIAG I/O
35 HAOO I 36 HAO2 I
37 -HCSO I 38 -HCSI 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.
Cabling
The maximum cable length form the Host system to the drive, plus the circuit pattern length inside
the Host systems, must not exceed 18 inches (45.7 cm).
Interface
This data sheet describes some aspects of the host interface to ATA drives. The interface
conforms to the CAM draft proposal for an ATA 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 a multi-tasking operating systems.
Sleep mode
During Sleep mode the drive will be activated by an 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 "I"
even after host writes to "0"...).
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 (E0)
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)
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 8-15
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 (WDE) requirements of Germany
(GOP).
Mechanical Data
Dimensions
Height 25.4 mm + or - 0.4 mm
Width 101.6 mm + or - 0.4 mm
146
+/-
0.6
.4
/- 0
.6 +
101
6.35 +/- 0.1
0.2
+/-
16 60 +
/-0.1
41.6
+/-0
.1
Depth 146.0 mm + or - 0.6 mm
(4X) UNC 6-32 2
Back Front
60.3 44.4
Weight 530 grams
Mounting Orientation
The Drive can be mounted in any axis (6 directions).
The maximum allowable penetration of the mounting screws is 1 3.5 mm 2 6 mm.
The recommended mounting screw torque is 3 + or - 0.5 (KgF.cm)
AMP is a trademark of AMP Incorporated.
Molex is a trademark of Molex Incorporated.
DATA MATE is a trademark of AMP Incorporated.
Western Digital is a trademark of the Western Digital Corporation.
NEXT is a trademark of NEXT Corporation.
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.
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