Hitachi Travelstar HTS542516K9SA00 User manual

5K250 SATA OEM Specification
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Hitachi Global Storage Technologies
Hard Disk Drive Specification
Hitachi Travelstar 5K250
2.5 inch SATA hard disk drive
Models: HTS542525K9A300, HTS542525K9SA00
HTS542516K9A300, HTS542516K9SA00
HTS542512K9A300, HTS542512K9SA00
HTS542580K9A300, HTS542580K9SA00
Revision 1.0 05 June 2007

5K250 SATA OEM Specification
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Preliminary Edition (Revision 0.1) (24 May 2007)
2nd Preliminary Edition (Revision 0.2) (29 May 2007)
Formal Release (Revision 1.0) (05 June 2007)
The following paragraph does not apply to the United Kingdom or any country where such
provisions are inconsistent with local law: HITACHI GLOBAL STORAGE TECHNOLOGIES
PROVIDES THIS PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow
disclaimer or express or implied warranties in certain transactions, therefore, this statement may
not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are
periodically made to the information herein; these changes will be incorporated in new editions of
the publication. Hitachi may make improvements or changes in any products or programs described
in this publication at any time.
It is possible that this publication may contain reference to, or information about, Hitachi products
(machines and programs), programming, or services that are not announced in your country. Such
references or information must not be construed to mean that Hitachi intends to announce such
Hitachi products, programming, or services in your country.
Technical information about this product is available by contacting your local Hitachi Global Storage
Technologies representative or on the Internet at http://www.hitachigst.com
Hitachi Global Storage Technologies may have patents or pending patent applications covering
subject matter in this document. The furnishing of this document does not give you any license to
these patents.
©Copyright Hitachi Global Storage Technologies
Note to U.S. Government Users —Documentation related to restricted rights —Use, duplication or
disclosure is subject to restrictions set forth in GSA ADP Schedule Contract with Hitachi Global
Storage Technologies.

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Table of Contents
GENERAL .............................................................................................................................................8
1INTRODUCTION.....................................................................................................................................8
1.1 Abbreviations ..........................................................................................................................8
1.2 References .............................................................................................................................11
1.3 General caution.....................................................................................................................11
1.4 Drive handling precautions ..................................................................................................11
2OUTLINE OF THE DRIVE ......................................................................................................................12
PART 1 FUNCTIONAL SPECIFICATION ......................................................................................... 13
3FIXED DISK SUBSYSTEM DESCRIPTION ................................................................................................14
3.1 Control Electronics................................................................................................................14
3.2 Head disk assembly data ...................................................................................................... 14
4FIXED DISK CHARACTERISTICS ........................................................................................................... 15
4.1 Formatted capacity by model number..................................................................................15
4.2 Data sheet .............................................................................................................................16
4.3 Cylinder allocation ................................................................................................................16
4.4 Performance characteristics .................................................................................................17
5DATA INTEGRITY ................................................................................................................................21
5.1 Data loss on power off ...........................................................................................................21
5.2 Write Cache...........................................................................................................................21
5.3 Equipment status..................................................................................................................21
5.4 WRITE safety........................................................................................................................21
5.5 Data buffer test .....................................................................................................................22
5.6 Error recovery .......................................................................................................................22
5.7 Automatic reallocation..........................................................................................................22
5.8 ECC .......................................................................................................................................23
6SPECIFICATION ..................................................................................................................................24
6.1 Environment .........................................................................................................................24
6.2 DC power requirements........................................................................................................26
6.3 Reliability ..............................................................................................................................28
6.4 Mechanical specifications .....................................................................................................31
6.5 Vibration and shock ..............................................................................................................33
6.6 Acoustics................................................................................................................................35
6.7 Identification labels ..............................................................................................................36
6.8 Electromagnetic compatibility..............................................................................................36
6.9 Safety.....................................................................................................................................37
6.10 Packaging ..............................................................................................................................37
6.11 Substance restriction requirements .....................................................................................37
7ELECTRICAL INTERFACE SPECIFICATIONS .......................................................................................... 38
7.1 Cabling ..................................................................................................................................38
7.2 Interface connector................................................................................................................38
7.3 Signal definitions ..................................................................................................................39
PART 2 INTERFACE SPECIFICATION ............................................................................................ 41
8GENERAL ...........................................................................................................................................42
8.1 Introduction...........................................................................................................................42
8.2 Terminology...........................................................................................................................42
9DEVIATIONS FROM STANDARD............................................................................................................43
10 PHYSICAL INTERFACE ...................................................................................................................... 43
11 REGISTERS .......................................................................................................................................43
11.1 Register naming convention ................................................................................................. 44
11.2 Command register.................................................................................................................44
11.3 Device Control Register ........................................................................................................44
11.4 Device Register......................................................................................................................45
11.5 Error Register .......................................................................................................................45

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11.6 Features Register..................................................................................................................45
11.7 LBA High Register................................................................................................................45
11.8 LBA Low Register .................................................................................................................46
11.9 LBA Mid Register .................................................................................................................46
11.10 Sector Count Register........................................................................................................ 46
11.11 Status Register ..................................................................................................................46
12 GENERAL OPERATION DESCRIPTIONS ..............................................................................................48
12.1 Reset Response......................................................................................................................48
12.2 Diagnostic and Reset considerations....................................................................................49
12.3 Power-off considerations.......................................................................................................50
12.4 Sector Addressing Mode........................................................................................................51
12.5 Power Management Feature ................................................................................................51
12.6 Advanced Power Management (Adaptive Battery Life Extender 3) Feature .....................53
12.7 Interface Power Management Mode (Slumber and Partial)................................................54
12.8 S.M.A.R.T. Function .............................................................................................................54
12.9 Security Mode Feature Set ...................................................................................................55
12.10 Protected Area Function ...................................................................................................61
12.11 Seek Overlap......................................................................................................................64
12.12 Write Cache Function........................................................................................................ 64
12.13 Reassign Function .............................................................................................................64
12.14 48-bit Address Feature Set ...............................................................................................65
12.15 Software Setting Preservation Feature Set......................................................................66
12.16 Native Command Queuing................................................................................................67
12.17 SMART Command Transport (SCT).................................................................................67
13 COMMAND PROTOCOL ...................................................................................................................... 69
13.1 Data In Commands ...............................................................................................................69
13.2 Data Out Commands ............................................................................................................69
13.3 Non-Data Commands............................................................................................................70
13.4 DMA Data Transfer Commands...........................................................................................71
13.5 First-parity DMA Commands...............................................................................................71
14 COMMAND DESCRIPTIONS ................................................................................................................72
14.1 Check Power Mode (E5h/98h)...............................................................................................76
14.2 Device Configuration Overlay (B1h) ....................................................................................77
14.3 Execute Device Diagnostic (90h) ..........................................................................................81
14.4 Flush Cache (E7h).................................................................................................................82
14.5 Flush Cache Ext (EAh) .........................................................................................................83
14.6 Format Track (50h: Vendor Specific) ...................................................................................84
14.7 Format Unit (F7h: Vendor Specific) .....................................................................................85
14.8 Identify Device (ECh)............................................................................................................86
14.9 Idle (E3h/97h)........................................................................................................................97
14.10 Idle Immediate (E1h/95h) .................................................................................................98
14.11 Initialize Device Parameters (91h) ...................................................................................99
14.12 Read Buffer (E4h)............................................................................................................100
14.13 Read DMA(C8h/C9h).......................................................................................................101
14.14 Read DMA Ext (25h) .......................................................................................................102
14.15 Read FPDMA Queued (60h)............................................................................................103
14.16 Read Log Ext(2Fh)........................................................................................................... 104
14.17 Read Multiple (C4h) ........................................................................................................112
14.18 Read Multiple Ext (29h).................................................................................................. 113
14.19 Read Native Max Address (F8h).....................................................................................114
14.20 Read Native Max Address Ext (27h)............................................................................... 115
14.21 Read Sector(s) (20h/21h) ................................................................................................. 116
14.22 Read Sector(s) Ext (24h)..................................................................................................117
14.23 Read Verify Sector(s) (40h/41h) ...................................................................................... 118
14.24 Read Verify Sector(s) Ext (42h)....................................................................................... 119
14.25 Recalibrate (1xh) ............................................................................................................. 120
14.26 Security Disable Password (F6h)....................................................................................121
14.27 Security Erase Prepare (F3h) ......................................................................................... 122
14.28 Security Erase Unit (F4h) ...............................................................................................123

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14.29 Security Freeze Lock (F5h) .............................................................................................125
14.30 Security Set Password (F1h)...........................................................................................126
14.31 Security Unlock (F2h) ..................................................................................................... 128
14.32 Seek (7xh) ........................................................................................................................129
14.33 Sense Condition (F0h : vendor specific)..........................................................................130
14.34 Set Features (EFh) .......................................................................................................... 131
14.35 Set Max Address (F9h)....................................................................................................133
14.36 Set Max Address Ext (37h) .............................................................................................135
14.37 Set Multiple (C6h) ...........................................................................................................137
14.38 Sleep (E6h/99h)................................................................................................................138
14.39 S.M.A.R.T Function Set (B0h)......................................................................................... 139
14.40 Standby (E2h/96h)...........................................................................................................154
14.41 Standby Immediate (E0h/94h) ........................................................................................155
14.42 Write Buffer (E8h)...........................................................................................................156
14.43 Write DMA (CAh/CBh)....................................................................................................157
14.44 Write DMA Ext (35h) ......................................................................................................158
14.45 Write DMA FUA Ext (3Dh)............................................................................................. 159
14.46 Write FPDMA Queued (61h)...........................................................................................160
14.47 Write Log Ext (3Fh)......................................................................................................... 161
14.48 Write Multiple (C5h) .......................................................................................................162
14.49 Write Multiple Ext (39h) ................................................................................................. 163
14.50 Write Multiple FUA Ext (CEh) ....................................................................................... 164
14.51 Write Sector(s) (30h/31h) ................................................................................................ 165
14.52 Write Sector(s) Ext (34h).................................................................................................166
14.53 Write Uncorrectable Ext (45h)........................................................................................ 167
15 TIMINGS .........................................................................................................................................169
List of Figures
Figure 1. Limits of temperature and humidity 24
Figure 2. Mounting hole locations 31
Figure 3. Interface connector pin assignments 38
Figure 4. Parameter descriptions 40
Figure 5 Initial Setting 57
Figure 6 Usual Operation 58
Figure 7 Password Lost 59
Figure 8 Set Max security mode transition 63
Figure 9 Seek overlap 64
Figure 10 Selective self-test test span example 141
List of Tables
Table 1. Formatted capacity by model number. 15
Table 2. Data sheet 16
Table 3. Cylinder allocation 16
Table 4. Performance characteristics 17
Table 5. Mechanical positioning performance 18
Table 6. Full stroke seek time 18
Table 7. Single track seek time 18
Table 8. Latency time 18
Table 9. Drive ready time 19
Table 10. Operating mode 20
Table 11. Drive ready time 20
Table 12. Environmental condition 24
Table 13. Magnetic flux density limits 25
Table 14. DC Power requirements 26
Table 15. Power consumption efficiency 27
Table 16. Physical dimensions and weight 31

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Table 17. Random vibration PSD profile breakpoints (operating) 33
Table 18. Swept sine vibration 33
Table 19. Random Vibration PSD Profile Breakpoints (nonoperating) 34
Table 20. Operating shock 34
Table 21. Nonoperating shock 34
Table 22. Weighted sound power 35
Table 23. Interface connector pins and I/O signals 39
Table 24 Register naming convention and correspondence 44
Table 25 Device Control Register 44
Table 26 Device Register 45
Table 27 Error Register 45
Table 28 Status Register 46
Table 29 Reset Response Table 48
Table 30 Default Register Values 49
Table 31 Diagnostic Codes 49
Table 32 Reset error register values 49
Table 33 Device’s behavior by ATA commands 50
Table 34 Power conditions 52
Table 35 Command table for device lock operation 60
Table 36 Command table for device lock operation - continued 61
Table 37 Set Max Set Password data content 63
Table 38 Preserved Software Setting 67
Table 39 SCT Action Code Supported 68
Table 40 Command set 72
Table 41 Command Set - continued 73
Table 42 Command Set (Subcommand) 74
Table 43 Check Power Mode Command (E5h/98h) 76
Table 44 Device Configuration Overlay Command (B1h) 77
Table 45 Device Configuration Overlay Features register values 77
Table 46 Device Configuration Overlay Data structure 79
Table 47 DCO error information definition 80
Table 48 Execute Device Diagnostic Command (90h) 81
Table 49 Flush Cache Command (E7h) 82
Table 50 Flush Cache EXT Command (EAh) 83
Table 51 Format Track Command (50h) 84
Table 52 Format Unit Command (F7h) 85
Table 53 Identify Device Command (ECh) 86
Table 54 Identify device information 87
Table 55 Identify device information --- Continued --- 88
Table 56 Identify device information --- Continued --- 89
Table 57 Identify device information --- Continued --- 90
Table 58 Identify device information --- Continued --- 91
Table 59 Identify device information --- Continued --- 92
Table 60 Identify device information --- Continued --- 93
Table 61 Identify device information --- Continued --- 94
Table 62 Identify device information --- Continued --- 95
Table 63 Number of cylinders/heads/sectors by models for HTS5425XXK9SA00 / HTS5425XXK9A300 96
Table 64 Idle Command (E3h/97h) 97
Table 65 Idle Immediate Command (E1h/95h) 98
Table 66 Initialize Device Parameters Command (91h) 99
Table 67 Read Buffer Command (E4h) 100
Table 68 Read DMA Command (C8h/C9h) 101
Table 69 Read DMA Ext Command (25h) 102
Table 70 Read FPDMA Queued Command (60h) 103
Table 71 Read Log Ext Command (2Fh) 104
Table 72 Log address definition 104
Table 73 General purpose Log Directory 105
Table 74 Extended comprehensive SMART error Log 106
Table 75 Extended Error log data structure 106
Table 76 Command data structure 107
Table 77 Error data structure 107
Table 78 Extended Self-test log data structure 108

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Table 79 Extended Self-test log descriptor entry 109
Table 80 Command Error information 109
Table 81 Phy Event Counter Identifier 110
Table 82 Phy Event Counter information 111
Table 83 Read Multiple Command (C4h) 112
Table 84 Read Multiple Ext Command (29h) 113
Table 85 Read Native Max Address Command (F8h) 114
Table 86 Read Native Max Address Ext Command (29h) 115
Table 87 Read Sector(s) Command (20h/21h) 116
Table 88 Read Sector(s) Ext Command (24h) 117
Table 89 Read Verify Sector(s) Command (40h/41h) 118
Table 90 Read Verify Sector(s) Ext Command (42h) 119
Table 91 Recalibrate Command (1xh) 120
Table 92 Security Disable Password Command (F6h) 121
Table 93 Password Information for Security Disable Password command 121
Table 94 Security Erase Prepare Command (F3h) 122
Table 95 Security Erase Unit Command (F4h) 123
Table 96 Erase Unit Information 123
Table 97 Security Freeze Lock Command (F5h) 125
Table 98 Security Set Password Command (F1h) 126
Table 99 Security Set Password Information 126
Table 100 Security Unlock Command (F2h) 128
Table 101 Security Unlock Information 128
Table 102 Seek Command (7xh) 129
Table 103 Sense Condition Command (F0h) 130
Table 104 Set Features Command (EFh) 131
Table 105 Set Max Address Command (F9h) 133
Table 106 Set Max Address Ext Command (37h) 135
Table 107 Set Multiple Command (C6h) 137
Table 108 Sleep Command (E6h/99h) 138
Table 109 S.M.A.R.T. Function Set Command (B0h) 139
Table 110 Log sector addresses 142
Table 111 Device Attribute Data Structure 144
Table 112 Individual Attribute Data Structure 145
Table 113 Status Flag Definitions 146
Table 114 Device Attribute Thresholds Data Structure 148
Table 115 Individual Threshold Data Structure 149
Table 116 SMART Log Directory 149
Table 117 S.M.A.R.T. error log sector 150
Table 118 Error log data structure 150
Table 119 Command data structure 151
Table 120 Error data structure 151
Table 121 Self-test log data structure 152
Table 122 Selective self-test log data structure 153
Table 123 S.M.A.R.T. Error Codes 153
Table 124 Standby Command (E2h/96h) 154
Table 125 Standby Immediate Command (E0h/94h) 155
Table 126 Write Buffer Command (E8h) 156
Table 127 Write DMA Command (CAh/CBh) 157
Table 128 Write DMA Ext Command (35h) 158
Table 129 Write DMA FUA Ext Command (3Dh) 159
Table 130 Write FPDMA Queued Command (61h) 160
Table 131 Write Log Ext Command 161
Table 132 Write Multiple Command (C5h) 162
Table 133 Write Multiple Ext Command (39h) 163
Table 134 Write Multiple FUA Ext Command (CEh) 164
Table 135 Write Sector(s) Command (30h/31h) 165
Table 136 Write Sector(s) Ext Command (34h) 166
Table 137 Write Uncorrectable Ext Command (45h) 167
Table 138 Timeout Values 169

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General
1 Introduction
This document describes the specifications of the HITACHI Travelstar 5K250, a 2.5-inch hard disk
drive with Serial ATA interface:
Drive
name Model Number Max data transfer rate
(Gbps)
Capacity
(GB) Height (mm) Rotation speed (rpm)
HTS542525K9A300 3.0
Travelstar
5K250-250 HTS542525K9SA00 1.5 250 9.5 5400
HTS542516K9A300 3.0
Travelstar
5K250-160 HTS542516K9SA00 1.5 160 9.5 5400
HTS542512K9A300 3.0
Travelstar
5K250-120 HTS542512K9SA00 1.5 120 9.5 5400
HTS542580K9A300 3.0
Travelstar
5K250-80 HTS542580K9SA00 1.5 80 9.5 5400
Part 1 of this document beginning on page 14 defines the hardware functional specification. Interface
specification is separately issued.
1.1 Abbreviations
Abbreviation Meaning
32 KB 32 x 1024 bytes
64 KB 64 x 1024 bytes
“ inch
A amp
AC alternating current
AT Advanced Technology
ATA Advanced Technology Attachment
Bels unit of sound power
BIOS Basic Input/Output System
°C degrees Celsius
CSA Canadian Standards Association
C-UL Canadian-Underwriters Laboratory
Cyl cylinder
DC direct current
DFT Drive Fitness Test
DMA Direct Memory Access
ECC error correction code
EEC European Economic Community

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EMC electromagnetic compatibility
ERP Error Recovery Procedure
Esd electrostatic discharge
FCC Federal Communications Commission
FRU field replacement unit
G gravity, a unit of force
Gb 1 000 000 000 bits
GB 1 000 000 000 bytes
GND ground
h hexadecimal
HDD hard disk drive
Hz hertz
I Input
ILS integrated lead suspension
imped impedance
I/O Input/Output
ISO International Standards Organization
KB 1,000 bytes
Kbit/mm 1,000 bits per mm
Kbit/sq-mm 1000 bits per square mm
KHz kilohertz
LBA logical block addressing
Lw unit of A-weighted sound power
m meter
max. or Max. maximum
MB 1,000,000 bytes
Mbps 1,000,000 Bit per second
Mb/sec 1,000,000 Bit per second
MB/sec 1,000,000 bytes per second
MHz megahertz
MLC Machine Level Control
mm millimeter
ms millisecond
us, s microsecond
Nm Newton meter
No. or # number
oct/min oscillations per minute
O Output
OD Open Drain Programmed Input/Output

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PIO
POH power on hours
Pop. population
P/N part number
p-p peak-to-peak
PSD power spectral density
RES radiated electromagnetic susceptibility
RFI radio frequency interference
RH relative humidity
% RH per cent relative humidity
RMS root mean square
RPM revolutions per minute
RST reset
R/W read/write
sec second
Sect/Trk sectors per track
SELV secondary low voltage
S.M.A.R.T Self-monitoring, analysis, and reporting technology
Trk. track
TTL transistor-transistor logic
UL Underwriters Laboratory
V volt
VDE Verband Deutscher Electrotechniker
W watt
3-state transistor-transistor tristate logic

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1.2 References
Serial ATA International Organization : Serial ATA Revision 2.6
1.3 General caution
Do not apply force to the top cover (See figure below).
Do not cover the breathing hole on the top cover (See figure below).
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
1.4 Drive handling precautions
Do not press on the drive cover during handling.

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2 Outline of the drive
 2.5-inch, 9.5-mm Height
 Perpendicular Recording
 Formatted capacities of 250GB, 160GB,120GB, and 80GB (512 bytes/sector)
 SATA Interface conforming to Serial ATA International Organization: Serial ATA Revision
2.6(15-February-2007)
 Integrated controller
 No-ID recording format
 Coding : 100/102 2bit parity (199/200 RC Modulation Encoding)
 Multi zone recording
 Enhanced ECC
 10 bit 40 symbol non Interleaved Read Solomon code
 Non interleave On-The –Fly correction
 Included 2 symbol system ECC
 Segmented Buffer with write cache
 8192 KB - Upper 736 KB is used for firmware
 Fast data transfer rate
 HTS5425xxK9A300 model : up to 3.0Gbit/s
 HTS5425xxK9SA00 model : up to 1.5Gbit/s
 Media data transfer rate (max):
 665 Mb/s
 Average seek time: 11 ms for read
 Closed-loop actuator servo (Embedded Sector Servo)
 Rotary voice coil motor actuator
 Load/Unload mechanism
 Mechanical latch
 0.55 Watts at idle state
 Power on to ready
 3.5 sec
 Operating shock
 3920 m/sec2 (400 G)/2ms
 1960 m/sec2 (200G)/1ms
 Nonoperating shock
 9800 m/sec2 (1000 G)/1ms
 Full data encryption as optional (HTS5425xxK9SA00 model only)

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Part 1 Functional Specification

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3 Fixed disk subsystem description
3.1 Control Electronics
The control electronics works with the following functions:
 SATA Interface Protocol
 Embedded Sector Servo
 No-ID (TM) formatting
 Multizone recording
 Code: 100/102 bit parity (199/200 RC Modulation Encoding)
 System ECC
 Enhanced Adaptive Battery Life Extender
3.2 Head disk assembly data
The following technologies are used in the drive:
 Femto Slider
 Perpendicular recording disk and write head
 TMR head
 Integrated lead suspension (ILS)
 Load/unload mechanism
 Mechanical latch

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4 Fixed disk characteristics
4.1 Formatted capacity by model number
Description HTS542525K9A300
HTS542525K9SA00 HTS542516K9A300 HTS542516K9SA00 HTS542512K9A300 HTS542512K9SA00 HTS542580K9A300 HTS542580K9SA00
Physical Layout
Bytes per Sector 512 512 512 512
Number of Heads 4 3 2 2
Number of Disks 2 2 1 1
Logical Layout
Number of Heads 16 16 16 16
Number of Sectors/
Track 63 63 63 63
Number of
Cylinders 16,383 16,383 16,383 16,383
Number of Sectors 488,397,168 312,581,808 234,441,648 156,301,488
Total Logical Data
Bytes 250,059,350,016 160,041,885,696 120,034,123,776 80,026,361,856
Table 1. Formatted capacity by model number.

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4.2 Data sheet
250GB 160GB 120GB 80GB
Rotational Speed (RPM) 5400 5400 5400 5400
Data transfer rates (buffer to/from
media) (Mbps) 665 619 643 530
Data transfer rates (Gbit/sec) 1.5/ 3.0 1.5/ 3.0 1.5/ 3.0 1.5/ 3.0
Recording density (Kbit/mm) (Max)
(KBPI)(Max) 1100 1035 1076 902
Track density (Ktrack/mm)(Max)
(KTPI)(Max) 186 172 185 151
Areal density (Kbit/sq-mm.- Max)
(Gbit/sq-inch-Max) 205 192 200 167
Number of zones 24 24 24 24
Table 2. Data sheet
4.3 Cylinder allocation
Data format is allocated by each head characteristics. Typical format is described below.
125GB/p Mid BIP-Mid TPI format
Zone Cylinder No. of
Sectors/Trk
0 0 - 4535 1368
1 4536 - 12149 1344
2 12150 - 15146 1312
3 15147 - 18872 1296
4 18873 - 22598 1272
5 22599 - 28025 1248
6 28026 - 35396 1200
7 35397 - 39122 1176
8 39123 - 45926 1152
9 45927 - 49814 1120
10 49815 - 55322 1080
11 55323 - 60830 1056
12 60831 - 65771 1032
13 65772 - 70550 1008
14 70551 - 75167 984
15 75168 - 81404 960
16 81405 - 84401 928
17 84402 - 90233 896
18 90234 - 94931 864
19 94932 - 99224 832
20 99225 - 103517 800
21 103518 - 110240 768
22 110241 - 112103 736
23 112104 - 116558 704
Table 3. Cylinder allocation

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4.4 Performance characteristics
Drive 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 drive performance. There are other parameters which
contribute to the performance of the actual system. This specification defines the essential characteristics
of the drive. 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 detailed descriptions are found in
section 5.0.
Function
Average Random Seek Time - Read (ms) 11
Average Random Seek Time - Write (ms) 13
Rotational Speed (RPM) 5400
Power-on-to-ready (sec) 3.5
Command overhead (ms) 1.0
Disk-buffer data transfer (Mb/s) (max) 665
Buffer-host data transfer (Gbit/s) (max) 1.5 / 3.0
Table 4. Performance characteristics
4.4.1 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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4.4.2 Mechanical positioning
4.4.2.1 Average seek time (including settling)
Command Type Typical (ms) Max. (ms)
Read 11 14
Write 13 15
Table 5. Mechanical positioning performance
Typical and Max. are defined throughout the performance specification as follows:
Typical Average of the drive population tested at nominal environmental and voltage conditions.
Max. Maximum value measured on any one drive over the full range of the environmental and
voltage conditions. (See section 6.1, "Environment" on page 23 and section 6.2, "DC power
requirements" on page 25)
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.
max.
Σ(max. + 1 – n)(Tnin + Tnout)
n=1
Weighted Average = ––––––––––––––––––––––––––––
(max. + 1)(max)
Where: max. = maximum seek length
n = seek length (1-to-max.)
Tn
in = inward measured seek time for an n-track seek
Tn
out = outward measured seek time for an n-track seek
4.4.2.2 Full stroke seek
Command Type Typical (ms) Max. (ms)
Read 20.0 25.0
Write 21.0 26.0
Table 6. Full stroke seek time
Full stroke seek time in milliseconds is the average time of 1000 full stroke seeks.
4.4.2.3 Single track seek time (without command overhead, including
settling)
Command Type Typical (ms) Maximum (ms)
Read 1.0 2.0
Write 1.1 2.2
Table 7. 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).
4.4.2.4 Average latency
Rotational Speed
(RPM) Time for one revolution (ms) Average Latency (ms)
5400 11.1 5.5
Table 8. Latency time

5K250 SATA OEM Specification
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4.4.2.5 Drive ready time
Condition Typical (sec) Max. (sec)
Power On To Ready 3.5 9.5
Table 9. Drive ready time
Ready The condition in which the drive is able to perform a media access command
(for example—read, write) immediately.
Power On To Ready This includes the time required for the internal self diagnostics.

5K250 SATA OEM Specification
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4.4.3 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.
Table 10. Operating mode
4.4.3.1 Mode transition time
From To Transition
Time (typ) Transition Time (max.)
Standby Idle 2.5 9.5
Table 11. Drive ready time
4.4.3.2 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 58,
"Drive address setting" for details.
4.4.3.3 Adaptive power save control
The transient timing from Performance Idle mode to Active Idle mode and Active Idle mode to Low Power
Idle mode is controlled adaptively according to the access pattern of the host system. The transient
timing from Low Power Idle mode to Standby mode is also controlled adaptively, if it is allowed by Set
Features Enable Advanced Power Management subcommand.