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IBM storage products
Product summary
Deskstar 25GP
AT/IDE
Models:DJNA-352500, DJNA-352030,
DJNA-351520, DJNA-351010
Introducing Applications
IBM's latest Deskstar drives are ideal for high- Y High performance Desktop personal computers
performance desktop users. With capacities of up to Y Entry servers
25GB and a rotational speed of 5400RPM users have Y Entry workstations
access to the highest capacities and performance in
the industry.
Y Multimedia applications
Y Video editing
Features Benefits
Y 10 GB, 15 GB, 20 GB & 25 GB formatted Y Range of capacities to meet the need for
capacities increasing storage requirements
Y Industry standard interface
Y PIO Mode 4 rates up to 16.6 MB/sec Y Popular interface with excellent performance.
Y Ultra DMA/66 rates up to 66.6 MB/sec
Y 111 - 196 Mb/sec media data transfer rate Y Excellent data rate across disk surface.
Y Rotational speed 5,400 RPM
Y Average seek time 8.5 ms (read)
Y Fast access to data
Y Average latency 5.56 ms
Y 1966 KB and 430 KB1 segmented sector buffers Y Fast access to data and improved throughput
Y ECC on-the-fly Y High reliability
Y Power saving modes Y Reduced power consumption
Y S.M.A.R.T. function support
Y Protection of user data
Y Drive Fitness Test (DFT) technology
Y Security function support Y Password protection for sensitive data
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DJNA-351520 & DJNA-351010
Page 1
IBM Hard Disk Drive Technical Support Center version 4.0
IBM storage products
Power supply current
Connectors Jumper block
DJNA-352500, -352030
Jumper settings +5 volts +12 volts
Pin 1 pop. mean pop. mean
(in amps) (in amps)
Pin A
Idle average 0.24 0.26
I G E C A Idle ripple
0.23 0.50
(peak to peak)
AT I/F Jumper Power
Connector Block Connector H F D B Seek peak 0.46 1.71
1
Seek average 0.28 0.44
The DC power connector is Start up (max.) 0.65 2.00
designed to mate with AMP (part RND R/W peak 0.70 1.71
Jumper pins are located between RND R/W
1-480424-0) using AMP pins (part power pins and AT interface pins. 2 0.35 0.4
350078-4) strip or (part 61173-4 average
Pins A through I are prepared for Standby
loose piece, or their equivalents. jumper setting. 0.13 0.009
average
Pin assignments are shown below.
Sleep average 0.052 0.011
16 head logical architecture
Note: The AT signal connector is a Master active A-B and G-H DJNA-351520, -351010
40 pin connector. Slave active A-B and C-D Idle average 0.24 0.21
Pin Voltage Cable Select A-B and E-F Idle ripple
1 +12 V
Master/Slave present E-F and G-H 0.22 0.33
4 3 2 1 2 GND
(peak to peak)
3 GND Reserved I Seek peak 0.46 1.56
4 +5 V 1
Seek average 0.28 0.35
15 head logical architecture Start up (max.) 0.64 1.58
Master active A-C and G-H RND R/W peak 0.66 1.56
Slave active A-C RND R/W
Cabling Cable select A-C and E-F 2 0.35 0.32
average
Master/Slave present A-C, E-F, and G-H
The maximum cable length from Standby
0.13 0.009
Reserved I average
the host system to the drive plus
the length of the circuit pattern in All other jumper setting patterns Sleep average 0.052 0.011
the host system should not exceed are reserved. Do not make other 1. Random seeks at 40% duty
18 inches. settings! cycle.
For higher data transfer application Note: Shipping default is Master 2. Seek duty = 30%, W/R duty =
(greater than 8.3 MB/sec), a con- active. 45%, Idle Duty = 25%.
sideration in system design is
recommended to reduce cable
DC power requirements
noise and/or cross-talk, such as a
shorter cable, bus termination, a Connection to the product should
shielded cable, etc. be made in isolated secondary
For systems operating with Ultra circuits (SELV). The following
DMA mode 3 or 4, the voltage specification is applied at
80-conductor ATA cable assembly the power connector of the drive.
(SFF-8049) should be used. There is no special power on/off
sequencing required.
Data organization (logical)
DJNA- 351010 351520 352030 352500
Number of heads 16*/15 16*/15 16*/15 16*/15
Sectors/track 63 63 63 63
Number of cylinders 16,383 16,383 16,383 16,383
Customer usable
10,141,286,400 15,377,080,320 20,416,757,760 25,590,620,160
data bytes
* Shipping default
Page 2
IBM Hard Disk Drive Technical Support Center version 4.0
IBM storage products
Power supply generated ripple Hot Plug/Unplug support Environment
Hot plugging/unplugging is not Operating conditions
Maximum Notes allowed because damage to the Temperature 5 to 55