IBM DJSA-210, Travelstar 32GH, Travelstar 30GT, Travelstar 20GN, DJSA-232 Specifications

IBM

Hard disk drive specifications

Travelstar 32GH, 30GT & 20GN

2.5 inch ATA/IDE hard disk drive

DJSA-210DJSA-232Models:
DJSA-205DJSA-230

DJSA-220

Revision 4.0 7 December 2001

S07N-3499-05 Publication #1520

This page intentionally left blank.

IBM storage products - official published specifications

IBM

Hard disk drive specifications

Travelstar 32GH, 30GT & 20GN

2.5 inch ATA/IDE hard disk drive

DJSA-210DJSA-232Models:
DJSA-205DJSA-230

DJSA-220

Revision 4.0 7 December 2001

S07N-3499-05 Publication #1520

IBM storage products - official published specifications

1st Edition (Revision 0.1) S07N-3499-00 (4th April, 2000) Preliminary
2nd Edition (Revision 0.2) S07N-3499-01 (24th April, 2000) Preliminary
3rd Edition (Revision 1.0) S07N-3499-02 (9th May, 2000)
4th Edition (Revision 2.0) S07N-3499-03 (15th June, 2000) Preliminary
5th Edition (Revision 3.0) S07N-3499-04 (30th June, 2000)
6th Edition (Revision 4.0) S07N-3499-05 (7 December 2001)
The following paragraph does not apply to the United Kingdom or any country where such provisions are

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Technical information about this product is available by contacting the local IBM representative or by using the
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Internet: http://www.ibm.com/harddrive
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Note to US Government Users—Documentation related to restricted rights—Use, duplication or disclosure is subject

to restrictions set forth in GSA ADP Schedule Contract with IBM Corp.

Table of contents

List of figures

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Part 1. Functional specification

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ix

11.0 Introduction

11.1 Abbreviations

31.2 References

31.3 General caution

41.4 Drive handling precautions

52.0 General features

7

93.0 Fixed disk subsystem description

93.1 Control Electronics

93.2 Head disk assembly data

114.0 Fixed disk characteristics

114.1 Default logical drive parameters

114.2 Formatted capacity by model number

124.3 Data sheet

124.4 Cylinder allocation by model number

134.5 Performance characteristics

134.5.1 Command overhead

144.5.2 Mechanical positioning

164.5.3 Operating modes

195.0 Data integrity

195.1 Data loss on power off

195.2 Write Cache

195.3 Equipment status

205.4 WRITE safety

205.5 Data buffer test

205.6 Error recovery

205.7 Automatic reallocation

205.7.1 Nonrecovered write errors

205.7.2 Nonrecoverable read error

205.7.3 Recovered read errors

215.8 ECC

236.0 Specification

236.1 Environment

236.1.1 Temperature and humidity

246.1.2 Magnetic fields

256.2 DC power requirements

266.2.1 Energy consumption efficiency

266.3 Startup current

286.4 Reliability

286.4.1 Data reliability

286.4.2 Failure prediction (S.M.A.R.T.)

286.4.3 Cable noise interference

296.4.4 Service life and usage condition

296.4.5 Preventive maintenance

296.4.6 Load/unload

Travelstar 32GH/30GT/20GN hard disk drive specifications

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316.5 Mechanical specifications

316.5.1 Physical dimensions and weight

316.5.2 Mounting hole locations

326.5.3 Connector and jumper description

326.5.4 Mounting orientation

336.5.5 Load/unload mechanism

346.6 Vibration and shock

346.6.1 Operating vibration

356.6.2 Nonoperating vibration

356.6.3 Operating shock

366.6.4 Nonoperating shock

376.7 Acoustics

376.7.1 Sound power level

376.7.2 Discrete tone penalty

386.8 Identification labels

386.9 Electromagnetic compatibility

386.9.1 CE Mark

386.9.2 C-Tick Mark

396.10 Safety

396.10.1 UL and CSA approval

396.10.2 IEC compliance

396.10.3 German Safety Mark

396.10.4 Flammability

396.10.5 Secondary circuit protection

396.11 Packaging

417.0 Electrical interface specifications

417.1 Cabling

417.2 Interface connector

427.3 Signal definitions

437.4 Signal descriptions

467.5 Interface logic signal levels

467.6 Reset timings

477.7 PIO timings

487.8 Multiword DMA timings

497.9 Ultra DMA timings

497.9.1 Initiating Read DMA

507.9.2 Host Pausing Read DMA

517.9.3 Host Terminating Read DMA

527.9.4 Device Terminating Read DMA

537.9.5 Initiating Write DMA

547.9.6 Device Pausing Write DMA

567.9.7 Host Terminating Write DMA

577.10 Drive address setting

577.11 Drive default address setting

587.12 Addressing of HDD registers

Part 2. Interface specification

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59

618.0 General

618.1 Introduction

618.2 Terminology

639.0 Deviations from standard

6510.0 Registers

6610.1 Alternate Status Register

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6610.2 Command Register

6610.3 Cylinder High Register

6610.4 Cylinder Low Register

6710.5 Data Register

6710.6 Device Control Register

6810.7 Drive Address Register

6810.8 Device/Head Register

6910.9 Error Register

6910.10 Features Register

6910.11 Sector Count Register

7010.12 Sector Number Register

7010.13 Status Register

7111.0 General operation descriptions

7111.1 Reset response

7311.1.1 Register initialization

7411.2 Diagnostic and Reset considerations

7511.3 Power-off considerations

7511.3.1 Load/Unload

7511.3.2 Emergency unload

7611.3.3 Required power-off sequence

7611.4 Sector Addressing Mode

7611.4.1 Logical CHS addressing mode

7711.5 Power management features

7711.5.1 Power Mode

7711.5.2 Power management commands

7811.5.3 Standby/Sleep command completion timing

7811.5.4 Standby timer

7811.5.5 Status

7811.5.6 Interface Capability for Power Modes

7911.5.7 Initial Power Mode at Power On

7911.6 Advanced Power Management (ABLE-3) feature

7911.6.1 Performance Idle Mode

7911.6.2 Active Idle Mode

8011.6.3 Low Power Idle Mode

8011.6.4 Transition Time

8011.7 S.M.A.R.T. Function

8011.7.1 Attributes

8011.7.2 Attribute values

8111.7.3 Attribute thresholds

8111.7.4 Threshold exceeded condition

8111.7.5 S.M.A.R.T. commands

8111.7.6 S.M.A.R.T. operation with power management modes

8111.8 Security Mode Feature Set

8211.8.1 Security Mode

8211.8.2 Security level

8211.8.3 Password

8211.8.4 Master Password Revision Code

8211.8.5 Operation example

8611.8.6 Command table

8811.9 Protected Area Function

8811.9.1 Example for operation (In LBA Mode)

8911.9.2 Set Max security extension commands

9111.10 Address Offset Feature (vendor specific)

9211.10.1 Enable/Disable Address Offset Mode

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9211.10.2 Identify Device Data

9311.10.3 Exceptions in Address Offset Mode

9411.11 Seek Overlap

9511.12 Write Cache function

9511.13 Delayed Write function (vendor specific)

9511.13.1 Enable/Disable Delayed Write command

9611.14 Reassign Function

9611.14.1 Auto Reassign Function

9712.0 Command protocol

9712.1 Data In commands

9812.2 Data Out commands

9912.3 Nondata commands

10112.4 DMA Data Transfer commands

10313.0 Command descriptions

10713.1 Check Power Mode (E5h/98h)

10813.2 Enable/Disable Delayed Write (FAh: vendor specific)

10913.3 Execute Device Diagnostic (90h)

11013.4 Flush Cache (E7h)

11113.5 Format Track (50h: vendor specific)

11313.6 Format Unit (F7h: vendor specific)

11413.7 Identify Device (ECh)

12313.8 Identify Device DMA (EEh)

12413.9 Idle (E3h/97h)

12513.10 Idle Immediate (E1h/95h)

12613.11 Initialize Device Parameters (91h)

12713.12 Read Buffer (E4h)

12813.13 Read DMA (C8h/C9h)

13013.14 Read Long (22h/23h)

13213.15 Read Multiple (C4h)

13413.16 Read Native Max ADDRESS (F8h)

13613.17 Read Sectors (20h/21h)

13813.18 Read Verify Sectors (40h/41h)

14013.19 Recalibrate (1xh)

14113.20 Security Disable Password (F6h)

14213.21 Security Erase Prepare (F3h)

14313.22 Security Erase Unit (F4h)

14513.23 Security Freeze Lock (F5h)

14613.24 Security Set Password (F1h)

14813.25 Security Unlock (F2h)

15013.26 Seek (7xh)

15113.27 Sense Condition (F0h: vendor specific)

15213.28 Set Features (EFh)

15413.29 Set Max ADDRESS (F9h)

15613.30 Set Multiple (C6h)

15713.31 Sleep (E6h/99h)

15813.32 S.M.A.R.T. Function Set (B0h)

15913.32.1 S.M.A.R.T. Function Subcommands

16313.32.2 Device Attributes Data Structure

16813.32.3 Device Attribute Thresholds data structure

17013.32.4 S.M.A.R.T. error log sector

17313.32.5 Self-test log data structure

17413.32.6 Error reporting

17513.33 Standby (E2h/96h)

17613.34 Standby Immediate (E0h/94h)

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17713.35 Write Buffer (E8h)

17813.36 Write DMA (CAh/CBh)

18013.37 Write Long (32h/33h)

18213.38 Write Multiple (C5h)

18413.39 Write Sectors (30h/31h)

18513.40 Write Verify (3Ch: vendor specific)

18714.0 Time-out values

18915.0 Appendix

18915.1 Commands Support Coverage

19115.2 SET FEATURES Command Support Coverage

19115.3 Changed Points from DARA-XXXXXX

Index

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4Figure 1. Drive handling precautions
11Figure 2. Default logical drive parameters
11Figure 3. Formatted capacity by model number.
12Figure 4. Data sheet
12Figure 5. Cylinder allocation by model number
13Figure 6. Performance characteristics
14Figure 7. Mechanical positioning performance
14Figure 8. Full stroke seek time
15Figure 9. Single track seek time
15Figure 10. Latency time
15Figure 11. Drive ready time
16Figure 12. Operating mode
16Figure 13. Drive ready time
21Figure 14. Examples of error cases.
23Figure 15. Environmental condition
23Figure 16. Limits of temperature and humidity
24Figure 17. Magnetic flux density limits
25Figure 18. DC Power requirements
26Figure 19. Energy consumption efficiency
26Figure 20. Typical current wave form at start up of DJSA-220/210/205
27Figure 21. Typical current wave form at start up of DJSA-230
28Figure 22. Typical current wave form at start up of DJSA-232
31Figure 23. Physical dimensions and weight
31Figure 24. Mounting hole locations of the DJSA-220/210/205
32Figure 25. Mounting hole locations of the DJSA-232/230
34Figure 26. Random vibration PSD profile breakpoints (operating)
34Figure 27. Swept sine vibration
35Figure 28. Random Vibration PSD Profile Breakpoints (nonoperating)
35Figure 29. Operating shock
36Figure 30. Nonoperating shock
37Figure 31. Weighted sound power
41Figure 32. Interface connector pin assignments
42Figure 33. Table of signals
43Figure 34. Special signal definitions for Ultra DMA
46Figure 35. System reset timings
47Figure 36. PIO cycle timings
48Figure 37. Multiword DMA cycle timings
49Figure 38. Ultra DMA cycle timing (Initiating Read)
50Figure 39. Ultra DMA cycle timings (Host Pausing Read)
51Figure 40. Ultra DMA cycle timing (Host Terminating Read)
52Figure 41. Ultra DMA cycle timings (Device Terminating Read)
53Figure 42. Ultra DMA cycle timings (Initiating Write)
54Figure 43. Ultra DMA cycle timings (Device Pausing Write)
55Figure 44. Ultra DMA cycle timings (Device Terminating Write)
56Figure 45. Ultra DMA cycle timings (Host Terminating Write)
57Figure 46. Drive address setting
58Figure 47. I/O address map
65Figure 48. Register Set
66Figure 49. Alternate Status Register

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67Figure 50. Device Control Register
68Figure 51. Drive Address Register
68Figure 52. Device/Head Register
69Figure 53. Error Register
70Figure 54. Status Register
72Figure 55. Reset response table
73Figure 56. Default Register Values
73Figure 57. Diagnostic Codes
74Figure 58. Reset error register values
75Figure 59. Device behavior by ATA commands.
78Figure 60. Power conditions
83Figure 61. Initial setting
84Figure 62. Usual operation
85Figure 63. Password lost
86Figure 64. Command table for device lock operation (1 of 2)
87Figure 64. Command table for device lock operation (2 of 2)
89Figure 65. Set Max SET PASSWORD data content
90Figure 66. Set Max security mode transition
92Figure 67. Device address map before and after Set Feature
94Figure 68. Seek overlap

103Figure 69. Command set (1 of 2)
104Figure 69. Command set (2 of 2)
105Figure 70. Command Set (Subcommand)
107Figure 71. Check Power Mode command (E5h/98h)
108Figure 72. Enable/Disable Delayed Write command (FAh)
109Figure 73. Execute Device Diagnostic command (90h)
110Figure 74. Flush Cache command (E7h)
111Figure 75. Format Track command (50h)
112Figure 76. Format track data field format
113Figure 77. Format Unit command (F7h)
114Figure 78. Identify Device command (ECh)
115Figure 79. Identify device information (1 of 7)
116Figure 79. Identify device information (2 of 7)
117Figure 79. Identify device information (3 of 7)
118Figure 79. Identify device information (4 of 7)
119Figure 79. Identify device information (5 of 7)
120Figure 79. Identify device information (6 of 7)
121Figure 79. Identify device information (7 of 7)
122Figure 80. Number of cylinders/heads/sectors by models for DJSA-XXX.
123Figure 81. Identify Device DMA command (EEh)
124Figure 82. Idle command (E3h/97h)
125Figure 83. Idle Immediate command (E1h/95h)
126Figure 84. Initialize Device Parameters command (91h)
127Figure 85. Read Buffer command (E4h)
128Figure 86. Read DMA command (C8h/C9h)
130Figure 87. Read Long command (22h/23h)
132Figure 88. Read Multiple command (C4h)
134Figure 89. Read Native Max ADDRESS (F8h)
136Figure 90. Read Sectors command (20h/21h)
138Figure 91. Read Verify Sectors command (40h/41h)
140Figure 92. Recalibrate command (1xh)
141Figure 93. Security Disable Password command (F6h)
141Figure 94. Password Information for Security Disable Password command
142Figure 95. Security Erase Prepare command (F3h)

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143Figure 96. Security Erase Unit command (F4h)
143Figure 97. Erase Unit information
145Figure 98. Security Freeze Lock command (F5h)
146Figure 99. Security Set Password command (F1h)
147Figure 100. Security Set Password information
149Figure 101. Security Unlock command (F2h)
150Figure 102. Security Unlock information
151Figure 103. Seek command (7xh)
152Figure 104. Sense Condition Command (F0h)
153Figure 105. Set Features command (EFh)
155Figure 106. Set Max ADDRESS (F9h)
157Figure 107. Set Multiple command (C6h)
158Figure 108. Sleep command (E6h/99h)
159Figure 109. S.M.A.R.T. Function Set command (B0h)
161Figure 110. Log sector addresses
164Figure 111. Device Attribute Data Structure
165Figure 112. Individual Attribute Data Structure
166Figure 113. Status Flag definitions
169Figure 114. Device Attribute Thresholds Data Structure
170Figure 115. Individual Threshold Data Structure
171Figure 116. S.M.A.R.T. error log sector
172Figure 117. Error log data structure
172Figure 118. Command data structure
173Figure 119. Error data structure
174Figure 120. Self-test log data structure
175Figure 121. S.M.A.R.T. Error Codes
176Figure 122. Standby command (E2h/96h)
177Figure 123. Standby Immediate command (E0h/94h)
178Figure 124. Write Buffer command (E8h)
179Figure 125. Write DMA command (CAh/CBh)
181Figure 126. Write Long command (32h/33h)
183Figure 127. Write Multiple command (C5h)
185Figure 128. Write Sectors command (30h/31h)
187Figure 129. Time-out values
189Figure 130. Command coverage (1 of 2)
190Figure 130. Command coverage (2 of 2)
191Figure 131. SET FEATURES command coverage

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1.0 Introduction

This document describes the specifications of the following IBM 2.5 inch, ATA/IDE interface hard disk
drives:

(32 GB)• DJSA-232
(30 GB)• DJSA-230
(20 GB)• DJSA-220
(10 GB)• DJSA-210

(5 GB)• DJSA-205

Part 1 of this document defines the hardware functional specification. For details about the interface
specification refer to Part 2 of this document.

Note: These specifications are subject to change without notice.

1.1 Abbreviations

MeaningAbbreviation

32 x 1024 bytes32 KB
64 x 1024 bytes64 KB
inch"
ampA
alternating currentAC
Advanced TechnologyAT
Advanced Technology AttachmentATA
unit of sound powerBels
Basic Input/Output SystemBIOS
degrees Celsius°C
degrees Celsius per hour°C/Hour
Canadian Standards AssociationCSA
Canadian-Underwriters LaboratoryC-UL
cylinderCyl
direct currentDC
Drive Fitness TestDFT
Direct Memory AccessDMA
error correction codeECC
European Economic CommunityEEC
electromagnetic compatibilityEMC
Error Recovery ProcedureERP
electrostatic dischargeESD
Federal Communications CommissionFCC
field replacement unitFRU
gravity, a unit of forceG
1 000 000 000 bitsGb
1 000 000 000 bytesGB

2

/Hz

1 000 000 000 bits per square inchGb/sq.in.
(32 ft/sec)
groundGND
hexadecimalh
head disk assemblyHDA

2

per HertzG

Travelstar 32GH/30GT/20GN hard disk drive specifications

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hard disk driveHDD
hertzHz
InputI
integrated lead suspensionILS
impedanceimped
Input/OutputI/O
International Standards OrganizationISO
1,000 bytesKB
1,000,000 bits per secondMbits/sec
1,000 Bit Per InchKbpi
kilogram (force)-centimeterkgf-cm
kilohertzKHz
logical block addressingLBA
unit of A-weighted sound powerLw
meterm
maximummax. or Max.
1,000,000 bytesMB
1,000,000 Bit per secondMbps
1,000,000 Bit per secondMb/sec
1,000,000 bytes per secondMB/sec
1,000 ,00 bits per square inchMb/sq.in.
megahertzMHz
Machine Level ControlMLC
millimetermm
millisecondms
microsecondus
numberNo. or #
oscillations per minuteoct/min
OutputO
Open DrainOD
Programmed Input/OutputPIO
power on hoursPOH
populationPop.
part numberP/N
peak-to-peakp-p
power spectral densityPSD
radiated electromagnetic susceptiblityRES
radio frequency interferenceRFI
relative humidityRH
per cent relative humidity% RH
root mean squareRMS
revolutions per minuteRPM
resetRST
read/writeR/W
secondsec
sectors per trackSect/Trk
secondary low voltageSELV
Self-monitoring, analysis, and reporting technologyS.M.A.R.T
tracks per inchTPI
trackTrk.
transistor-transistor logicTTL
Underwriters LaboratoryUL
voltV
Verband Deutscher ElectrotechnikerVDE

Travelstar 32GH/30GT/20GN hard disk drive specifications

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wattW
transistor-transistor tristate logic3-state

1.2 References

! ATA/ATAPI-5 (T13/1321D Revision D)

1.3 General caution

! Do not apply force to the top cover (See Figure 1 on page 4).
! Do not cover the breathing hole on the top cover (See Figure 1 on page 4).
! Do not touch the interface connector pins or the surface of the printed circuit board.
! The drive can be damaged by shock or ESD (Electric Static Discharge). Any damages incurred to the

drive after removing it from the shipping package and the ESD protective bag are the responsibility of
the user.

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1.4 Drive handling precautions

Do not press on the drive cover during handling.

Figure 1. Drive handling precautions

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2.0 General features

! Height MCC Compliance

! (DJSA-232/230) 2.5 inch, 12.5±0.2 mm
! (DJSA-220/210/205) 2.5 inch, 9.5±0.2 mm

! Drive formatted capacity by model number

! (DJSA-232) 32 GB
! (DJSA-230) 30 GB
! (DJSA-220) 20 GB
! (DJSA-210) 10 GB

! (DJSA-205) 5 GB
! 512 bytes/sector
! AT Interface (Enhanced IDE) conforming to ATA-4
! Integrated controller
! No ID recording format
! Coding: 32/34
! Multizone recording
! Enhanced ECC on-the-fly

! 40 bytes 3 way Interleaved Reed Solomon Code

! 5 bytes per interleave on-the-fly correction

! Segmented Buffer with write cache

! 2 MB - Upper 174KB is used for firmware (DJSA-232/230/220)

! 512 KB - Upper 128KB is used for firmware (DJSA-210/205)
! Fast data transfer rate (up to 66.6 MB/sec)
! Media data transfer rate

! 203 (outer zone) - 109 (inner zone) Mb/sec (DJSA-230/220/210/205)

! 223 (outer zone) - 120 (inner zone) Mb/sec (DJSA-232)
! Average seek time 12 ms for read
! Closed-loop actuator servo (Embedded Sector Servo)
! Rotary voice coil motor actuator
! Load/Unload mechanism
! Mechanical latch
! Adaptive power save control

! 0.65 W at idle state (DJSA-220/210/205)

! 0.85 W at idle state (DJSA-230)

! 0.9 W at idle state (DJSA-232)

Travelstar 32GH/30GT/20GN hard disk drive specifications

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! Power on to ready

! 5.0 sec (DJSA-232)

! 3.3 sec (DJSA-230)

! 3.0 sec (DJSA-220/210/205)

! Nonoperating Shock

! 700 G 1ms (DJSA-232/230)

! 800 G 1 ms (DJSA-220/210/205)

! Operating Shock

! 150 G 2 ms (DJSA-232)

! 175 G 2 ms (DJSA-230/220/210/205)

! Address Offset Feature to support DFT implementation

Note: Mounting screw position is

! incompatible with DBOA,DMCA, DCRA, DSOA, DPRA models.
! compatible with DTNA, DLGA, DDLA, DTCA, DPLA, DYKA, DYLA, DADA, DKLA, DBCA, DCXA,

DCYA, DARA models.

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Part 1. Functional specification

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3.0 Fixed disk subsystem description

3.1 Control Electronics

The control electronics works with the following functions.

! AT Interface Protocol
! Embedded Sector Servo
! No-ID formatting
! Multizone recording
! Code: 32/34
! ECC on-the-fly
! Enhanced Adaptive Battery Life Extender

3.2 Head disk assembly data

The following technologies are used in each DJSA-XXX model.

! Pico Slider
! Smooth glass disk
! GMR head
! Integrated lead suspension (ILS)
! Load/unload mechanism
! Mechanical latch

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4.0 Fixed disk characteristics

4.1 Default logical drive parameters

The following table lists the default logical drive parameters by drive model number.

Model

Figure 2. Default logical drive parameters

Capacity

(GB)

Word 1

(Cyl)

Word 3

(Head)

Word 6

(Sect/Trk)

4.2 Formatted capacity by model number

Physical Layout

Logical Layout

Number of Sectors/
Track

Total Logical Data
Bytes

Word
60–61
(LBA)

Customer Usable

Data Bytes

32,003,112,9603B9C460h631616,38332DJSA-232
30,005,821,44037E3E40h631616,38330DJSA-230
20,003,880,9602542980h631616,38320DJSA-220
10,056,130,56012BB230h631616,38310DJSA-210

5,000,970,240950A60h631510,3365DJSA-205

DJSA-205DJSA-210DJSA-220DJSA-230DJSA-232Description

512512512512512Bytes per Sector

293–560293–560293–560293–560256-469Sectors per Track

12468Number of Heads
11234Number of Disks

1516161616Number of Heads
6363636363

10,33619,48538,76058,14062,010Number of Cylinders

9,767,52019,640,88039,070,08058,605,12062,506,080Number of Sectors

5,000,970,24010,056,130,56020,003,880,96030,005,821,44032,003,112,960

Figure 3. Formatted capacity by model number.

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4.3 Data sheet

Interface transfer rate (MB/sec)
ULTRA DMA 66

Figure 4. Data sheet

4.4 Cylinder allocation by model number

DJSA-230/220/210/205DJSA-232

42005400Rotational Speed (RPM)

109-203 Mbps120-223 MbpsData transfer rates (buffer to/from media)

66.6 MB/sec66.6 MB/sec
451399Recording density (Kbpi) (Max.)

3836Track density (Ktpi)

17.114.4Areal density (Gb/sq.in.)(Max.)
1616Number of zones

DJSA-230/220/210/205DJSA-232

No. of Sectors/TrkCylinderNo. of Sectors/TrkCylinderZone

5600–7674690–2550
560768–1535460256–10231
5331536–35834481024–30712
5203584–48634263072–40953
5064864–58874164096–56314
4805888–74234005632–71675
4807424–89593847168–89596
4538960–107513628960–107517
44010752–1203135210752–122878
42012032–1356735212288–135679
40013568–1561533613568–1561510
38015616–1689532015616–1740711
36016896–1868729817408–1894312
34018688–1996728818944–1996713
32019968–2201527219968–2124714
29322016–2278325621248–2150315

Figure 5. Cylinder allocation by model number

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4.5 Performance characteristics

File performance is characterized by the following parameters:

! Command Overhead
! Mechanical Positioning

! Seek Time

! Latency
! Data Transfer Speed
! Buffering Operation (Look ahead/Write Cache)

Note: All the above parameters contribute to file performance. There are other parameters which contri­bute to the performance of the actual system. This specification defines the essential file characteristics.
This specification does not include the system throughput as this is dependent upon the system and the
application.

The following table gives a typical value for each parameter. The detail descriptions are found in
section 5.0.

Function

Buffer-host data transfer (MB/s) (PIO Mode-4)

(Ultra DMA Mode-4)

Figure 6. Performance characteristics

Typical

DJSA-232

16.6

66.6

Typical

DJSA-230

16.6

66.6

Typical

DJSA-220/210/205

121212Average Random Seek Time For Read (ms)
131313Average Random Seek Time For Write (ms)

420042005400Rotational Speed (RPM)

3.03.35.0Power-on-to-ready (sec)

1.01.01.0Command overhead (ms)

109–203 109-203120-223Disk-buffer data transfer (Mb/s)

16.6

66.6

4.5.1 Command overhead

Command overhead time is defined as the interval from the time that a drive receives a command to the
time that the actuator starts its motion.

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4.5.2 Mechanical positioning

4.5.2.1 Average seek time (including settling)

Max. (ms)Typical (ms)Command Type

1412Read
1513Write

Figure 7. Mechanical positioning performance

Typical and Max. are defined throughout the performance specification as follows:

Average of the drive population tested at nominal environmental and voltage conditions.Typical

Max.

The seek time is measured from the start of motion of the actuator to the start of a reliable read or write
operation. A reliable read or write operation implies that error correction/recovery is not employed to cor­rect arrival problems. The Average Seek Time is measured as the weighted average of all possible seek
combinations.

Weighted Average =

Maximum value measured on any one drive over the full range of the environmental and
voltage conditions. (See section 6.1 on Environment and section 6.2 on DC power require­ments.)

max.

Σ (max. + 1 – n)(Tn

n=1

___________________________________________________

(max. + 1)(Tnin + Tn

+ Tn

in

out

)

out

)

Where: max. = maximum seek length
n = seek length (1-to-max.)
Tn
Tn

= inward measured seek time for an n-track seek

in

= outward measured seek time for an n-track seek

out

4.5.2.2 Full stroke seek

Max. (ms)Typical (ms)Command Type

3023.0Read

3124.0Write

Figure 8. Full stroke seek time

Full stroke seek time in milliseconds is the average time of 1000 full stroke seeks.

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4.5.2.3 Single track seek time (without command overhead, including settling)

Maximum (ms)Typical (ms)Command Type

4.02.5Read

4.53.0Write

Figure 9. Single track seek time

Single track seek is measured as the average of one (1) single track seek from every track in both
directions (inward and outward).

4.5.2.4 Average latency

Model

Figure 10. Latency time

4.5.2.5 Drive ready time

Figure 11. Drive ready time

Ready

The condition in which the drive is able to perform a media access command
(for example—read, write) immediately.
This includes the time required for the internal self diagnostics.Power On To Ready

Rotational Speed

(RPM)

Time/1 revolution

(ms)

Average Latency

(ms)

5.511.15400DJSA-232

7.114.34200DJSA-230/220/210/205

Max. (sec)Typical (sec)ModelCondition

9.55.0DJSA-232Power On To Ready

9.53.3DJSA-230Power On To Ready

9.53.0DJSA-220/210/205Power On To Ready

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4.5.3 Operating modes

Operating mode Description

Spin-Up: Start up time period from spindle stop or power down.
Seek: Seek operation mode
Write: Write operation mode
Read: Read operation mode
Performance: The device is capable of responding immediately to idle media access requests.

All electronic components remain powered and the full frequency servo remains
operational.

Active idle: The device is capable of responding immediately to media access requests.

Some circuitry—including servo system and R/W electronics—is in power saving
mode. The head is parked near the mid-diameter the disk without servoing.
A device in Active idle mode may take longer to complete the execution of a
command because it must activate that circuitry.

Low power idle: The head is unloaded onto the ramp position.

The spindle motor is rotating at full speed.

Standby: The device interface is capable of accepting commands.

The spindle motor is stopped. All circuitry but the host interface is in power saving
mode.
The execution of commands is delayed until the spindle becomes ready.

Sleep: The device requires a soft reset or a hard reset to be activated.

All electronics, including spindle motor and host interface, are shut off.

Figure 12. Operating mode

4.5.3.1 Mode transition time

Transition

Time (max.)

9.54.5IdleStandbyDJSA-232

9.52.0IdleStandby DJSA-230/220

9.51.8IdleStandbyDJSA-210/205

Figure 13. Drive ready time

ToFromModel

Transition
Time (typ)

4.5.3.2 Operating mode at power on

The device goes into Idle mode after power on or hard reset as an initial state. Initial state may be
changed to Standby mode using pin C on the interface connector. Refer to section 7.10 on page 57,
"Drive address setting", for details.

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