Hitachi Deskstar 7K500 User manual

Hard Disk Drive Specification
Serial ATA Addendum
Deskstar 7K500
3.5 inch Serial ATA hard disk drive
Models: HDS725050KLA360
Version 1.1 11 May 2006

Hard Disk Drive Specification
Serial ATA Addendum
Deskstar 7K500
3.5 inch Ultra Serial/ATA hard disk drive
Models: HDS725050KLA360
Version 1.1 11 May 2006

1th Edition (Revision 0.1) (20 May 2005)
2nd Edition (Revision 1.0) (20 June2005)
3rd Edition (Revision 1.1) (11 May 2006)
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Table of Contents
1.0 General..............................................................................................................1
1.1 Introduction.............................................................................................1
1.2 Terminology............................................................................................1
1.3 Deviations from standard........................................................................1
2.0 Registers............................................................................................................3
2.1 Alternate Status Register ........................................................................3
2.2 Alternate Status Register ........................................................................3
2.3 Command Register .................................................................................4
2.4 Cylinder High Register...........................................................................4
2.5 Cylinder Low Register............................................................................4
2.6 Data Register...........................................................................................5
2.7 Device Control Register.........................................................................5
2.8 Device/Head Register .............................................................................5
2.9 Error Register..........................................................................................6
2.10 Features Register...................................................................................6
2.11 Sector Count Register...........................................................................6
2.12 Status Register ......................................................................................7
3.0 General operation............................................................................................9
3.1 Reset response.........................................................................................9
3.2 Register initialization..............................................................................10
3.3 Diagnostic and Reset considerations ......................................................11
3.4 Power Management Mode (Slumber and Partial)...................................11
3.5 Sector Addressing Mode.........................................................................11
3.5.1 Logical CHS addressing mode .......................................................11
3.5.2 LBA addressing mode ....................................................................11
3.6 Power management Feature....................................................................13
3.6.1 Power mode ....................................................................................13
3.6.2 Power management commands ......................................................13
3.6.3 Standby timer..................................................................................13
3.6.4 Interface capability for power modes .............................................14
3.7 S.M.A.R.T. Function ..............................................................................15
3.7.1 Attributes ........................................................................................15
3.7.2 Attribute values...............................................................................15
3.7.3 Attribute thresholds.........................................................................15
3.7.4 Threshold exceeded condition ........................................................15
3.7.5 S.M.A.R.T. commands ...................................................................15
3.7.6 Off-line read scanning ....................................................................15
3.7.7 Error log..........................................................................................16
3.7.8 Self-test...........................................................................................16
3.8 Security Mode Feature Set......................................................................17
3.8.1 Security mode .................................................................................17
3.8.2 Security level ..................................................................................17
3.8.3 Passwords........................................................................................18

3.8.4 Operation example..........................................................................18
3.8.5 Command table...............................................................................21
3.9 Host Protected Area Feature...................................................................22
3.9.1 Example for operation (In LBA Mode)..........................................22
3.9.2 Security extensions .........................................................................23
3.10 Seek overlap..........................................................................................24
3.11 Write cache function.............................................................................25
3.12 Reassign function..................................................................................26
3.12.1 Auto Reassign function.................................................................26
3.13 Power-Up in Standby feature set ..........................................................27
3.14 Advanced Power Management feature set (APM) ...............................27
3.15 Automatic Acoustic Management feature set (AAM)..........................28
3.16 Address Offset Feature .........................................................................29
3.16.1 Enable/Disable Address Offset Mode...........................................29
3.16.2 Identify Device Data.....................................................................30
3.16.3 Exceptions in Address Offset Mode............................................30
3.17 48-bit Address Feature Set....................................................................31
3.18 Streaming Feature Set...........................................................................31
3.18.1 Streaming commands....................................................................32
3.18.2 Urgent bit......................................................................................32
3.18.3 Flush to Disk bit............................................................................32
3.18.4 Not Sequential bit .........................................................................32
3.18.5 Read Continuous bit......................................................................33
3.18.6 Write Continuous bit.....................................................................33
3.18.7 Handle Streaming Error bit...........................................................33
3.18.8 Streaming Logs.............................................................................33
3.18.9 SATA Interface Power Management............................................33
3.19 Software Setting Preservation...............................................................33
3.19.1 COMRESET Preservation Requirements.....................................34
3.20 SATA II Optional Features...................................................................34
3.21 Asynchronous Signal Recovery............................................................34
3.21.1 Device Power Connector Pin 11 Definition .................................35
3.21.2 Phy Event Counters ......................................................................35
4.0 Command protocol ..........................................................................................37
4.1 PIO Data In commands...........................................................................37
4.2 PIO Data Out Commands .......................................................................38
4.3 Non-data commands ..............................................................................39
4.4 DMA Data In commands and DMA Data Out commands.....................41
4.5 First-party DMA commands...................................................................41
5.0 Command descriptions....................................................................................43
5.1 Check Power Mode (E5h/98h) ...............................................................47
5.2 Configure Stream (51h) ..........................................................................48
5.3 Device Configuration Overlay (B1h) .....................................................50
5.3.1 DEVICE CONFIGURATION RESTORE (Subcommand C0h)...50
5.3.2 DEVICE CONFIGURATION FREEZE LOCK (Subcommand C1h)50
5.3.3 DEVICE CONFIGURATION IDENTIFY (Subcommand C2h)..51

5.3.4 DEVICE CONFIGURATION SET (Subcommand C3h) ..............51
5.4 Download Microcode (92h)....................................................................54
5.5 Execute Device Diagnostic (90h) ...........................................................55
5.6 Flush Cache (E7h) ..................................................................................56
5.7 Flush Cache Ext (EAh)...........................................................................57
5.8 Format Track (50h).................................................................................58
5.9 Format Unit (F7h)...................................................................................59
5.10 Identify Device (ECh)...........................................................................60
5.11 Idle (E3h/97h)......................................................................................71
5.12 Idle Immediate (E1h/95h).....................................................................72
5.13 Initialize Device Parameters (91h) .......................................................73
5.14 Read Buffer (E4h).................................................................................74
5.15 Read DMA (C8h/C9h)..........................................................................75
5.16 Read DMA Ext (25h)............................................................................77
5.17 Read Log Ext (2Fh) ..............................................................................79
5.17.1 General Purpose Log Directory....................................................81
5.17.2 Extended Comprehensive SMART Error Log..............................82
5.17.3 Extended Self-test log sector ........................................................84
5.17.4 Read Stream Error log ..................................................................85
5.17.5 Write Stream Error log .................................................................86
5.17.6 Streaming Performance log ..........................................................87
5.18 Read Long (22h/23h)............................................................................89
5.19 Read Multiple (C4h).............................................................................91
5.20 Read Multiple Ext (29h) .......................................................................93
5.21 Read Native Max ADDRESS (F8h).....................................................95
5.22 Read Native Max Address Ext (27h)....................................................96
5.23 Read Sectors (20h/21h).........................................................................97
5.24 Read Sector(s) Ext (24h).......................................................................99
5.25 Read Stream DMA (2Ah).....................................................................101
5.26 Read Stream PIO (2Bh)........................................................................104
5.27 Read Verify Sectors (40h/41h) .............................................................107
5.28 Read Verify Sector(s) (42h)..................................................................109
5.29 Recalibrate (1xh)...................................................................................111
5.30 Security Disable Password (F6h)..........................................................112
5.31 Security Disable Password (F3h)..........................................................113
5.32 Security Erase Unit (F4h) .....................................................................114
5.33 Security Freeze Lock (F5h) ..................................................................116
5.34 Security Set Password (F1h).................................................................117
5.35 Security Unlock (F2h) ..........................................................................119
5.36 Seek (7xh)............................................................................................120
5.37 Service (A2h .........................................................................................)121
5.38 Set Features (EFh) ................................................................................122
5.38.1 Set Transfer mode.........................................................................123
5.38.2 Write Cache ..................................................................................123
5.38.3 Advanced Power Management.....................................................123
5.38.4 Automatic Acoustic Management ................................................124

5.38.5 Set Maximum Host Interface Sector Time...................................125
5.39 Set Max ADDRESS (F9h)....................................................................126
5.39.1 Set Max Set Password (Feature=01h)...........................................128
5.39.2 Set Max Lock (Feature=02h)........................................................129
5.39.3 Set Max Unlock (Feature = 03h) ..................................................130
5.39.4 Set Max Freeze Lock (Feature = 04h) ..........................................131
5.40 Set Max Address Ext (37h)...................................................................132
5.41 Set Multiple (C6h) ................................................................................134
5.42 Sleep (E6h/99h) ....................................................................................135
5.43 S.M.A.R.T. Function Set (B0h)............................................................136
5.43.1 S.M.A.R.T. Function Subcommands...........................................136
5.43.2 Device Attribute Data Structure ...................................................140
5.43.3 Device Attribute Thresholds data structure ..................................143
5.43.4 S.M.A.R.T. Log Directory............................................................145
5.43.5 S.M.A.R.T. summary error log sector ..........................................145
5.43.6 Self-test log data structure ...........................................................147
5.43.7 Selective self-test log data structure .............................................148
5.43.8 Error reporting ..............................................................................149
5.44 Standby (E2h/96h)................................................................................150
5.45 Standby Immediate (E0h/94h)..............................................................151
5.46 Write Buffer (E8h)................................................................................152
5.47 Write DMA (CAh/CBh) .......................................................................153
5.48 Write DMA Ext (35h)...........................................................................155
5.49 Write Log Ext (3Fh) .............................................................................157
5.50 Write Long (32h/33h)...........................................................................158
5.51 Write Multiple (C5h) ............................................................................160
5.52 Write Multiple Ext (39h) ......................................................................162
5.53 Write Sectors (30h/31h)........................................................................164
5.54 Write Sector(s) Ext (34h)......................................................................166
5.55 Write Stream DMA (3Ah)....................................................................168
5.56 Write Stream PIO (3Bh) .......................................................................171
6.0 Timings .............................................................................................................175

List of Tables
Table 1. Alternate Status Register .................................................................3
Table 2. Alternate Status Register .................................................................3
Table 3. Device Control Register ..................................................................5
Table 4. Device Head/Register......................................................................5
Table 5. Error Register...................................................................................6
Table 6. Status Register .................................................................................7
Table 7. Reset response table.........................................................................9
Table 8. Default Register Values...................................................................10
Table 9. Diagnostic codes..............................................................................10
Table 10. Power conditions ...........................................................................14
Table 11. Command table for device lock operation.....................................21
Table 12. Seek overlap...................................................................................24
Table 13. Enable/Disable Address Offset Mode ...........................................30
Table 14. Command Set (1 of 2)....................................................................43
Table 15. Command Set (2 of 2)....................................................................44
Table 16. Command Set (subcommand)........................................................45
Table 17. Check Power Mode command (E5h/98h)......................................47
Table 18. Configure Stream Command (51h) ...............................................48
Table 19. Check Power Mode Command (E5h/98h).....................................50
Table 20. Device Configuration Overlay Features register values................50
Table 21. Device Configuration Overlay Data structure...............................52
Table 22. DCO error information definition..................................................53
Table 23. Download Microcode Command (92h).........................................54
Table 24. Execute Device Diagnostic command (90h) .................................55
Table 25. Flush Cache command (E7h).........................................................56
Table 26. Flush Cache Ext Command (EAh) ................................................57
Table 27. Format Track command (50h).......................................................58
Table 28. Format Unit command (F7h).........................................................59
Table 29. Identify Device command (ECh)...................................................60
Table 30. Identify device information (Part 1 of 7).......................................61
Table 31. Identify device information (Part 2 of 7)......................................62
Table 32. Identify device information (Part 3 of 7).......................................63
Table 33. Identify device information (Part 4 of 7).......................................64
Table 34. Identify device information (Part 5 of 7 ........................................66
Table 35. Identify device information (Part 6 of 7).......................................68
Table 36. Identify device information (Part 7 of 7).......................................70
Table 37. Idle command (E3h/97h)...............................................................71
Table 38. Idle Immediate command (E1h/95h).............................................72
Table 39. Initialize Device Parameters command (91h)................................73
Table 40. Read Buffer (E4h)..........................................................................74
Table 41. Read DMA command (C8h/C9h)..................................................75
Table 42. Read DMA Ext Command (25h)...................................................77
Table 43. Read Log Ext Command (2Fh)......................................................79

Table 44. Log Address Definition .................................................................80
Table 45. General Purpose Log Directory.....................................................81
Table 46. Extended Comprehensive SMART Error Log ..............................82
Table 47. Extended Error log data structure..................................................82
Table 48. Command data structure................................................................83
Table 49. Error data structure ........................................................................83
Table 50. Extended Self-test log descriptor entry..........................................85
Table 51. Read Stream Error Log..................................................................85
Table 52. Stream Error Log entry..................................................................86
Table 53. Write Stream Error Log.................................................................87
Table 54. Streaming Performance Parameters log.........................................87
Table 55. Sector Time Array Entry (Linearly Interpolated)..........................88
Table 56. Position Array Entry (Linearly Interpolated) ................................88
Table 57. Access Time Array Entry (Linearly Interpolated).........................88
Table 58. Read Long (22h/23h).....................................................................89
Table 59. Read Multiple (C4h)......................................................................91
Table 60. Read DMA Ext Command (25h)...................................................93
Table 61. Read Native Max ADDRESS (F8h)..............................................95
Table 62. Read Native Max Address Ext command (27h)............................96
Table 63. Read Sectors Command (20h/21h)................................................97
Table 64. Read Sector(s) Ext command (24h)..............................................99
Table 65. Read Stream DMA Command (2Ah) ............................................101
Table 66. Read Stream PIO Command (2Bh) ...............................................104
Table 67. Read Verify Sectors (40h/41h)......................................................107
Table 68. Read Verify Sector(s) command (42h)..........................................109
Table 69. Recalibrate (1xh) ...........................................................................111
Table 70. Security Disable Password (F6h)...................................................112
Table 71. Password Information for Security Disable Password command..112
Table 72. Security Disable Password (F3h)...................................................113
Table 73. Security Erase Unit (F4h)..............................................................114
Table 74. Erase Unit information ..................................................................114
Table 75. Security Freeze Lock command (F5h) ..........................................116
Table 76. Security Set Password command (F1h).........................................117
Table 77. Security Set Password Information ...............................................117
Table 78. Security Unlock command (F2h)...................................................119
Table 79. Seek command (7xh).....................................................................120
Table 80. Service command (A2h)................................................................121
Table 81. Set Features command (EFh).........................................................122
Table 82. Set Max ADDRESS command (F9h)............................................126
Table 83. Set Max Set Password command...................................................128
Table 84. Set Max Set Password data contents .............................................128
Table 85. Set Max Lock command................................................................129
Table 86. Set Max Unlock command (F9h) ..................................................130
Table 87. Set Max Freeze Lock (F9h)...........................................................131
Table 88. Set Max Address Ext command (37h)...........................................132
Table 89. Set Multiple command (C6h) ........................................................134

Table 90. Sleep command (E6h/99h) ............................................................135
Table 91. S.M.A.R.T. Function Set command (B0h)....................................136
Table 92. Device Attribute Data Structure ....................................................140
Table 93. Individual Attribute Data Structure ...............................................140
Table 94. Device Attribute Thresholds Data Structure..................................144
Table 95. Individual Threshold Data Structure .............................................144
Table 96. S.M.A.R.T. Log Directory.............................................................145
Table 97. S.M.A.R.T. summary error log sector .........................................145
Table 98. Error log data structure.................................................................146
Table 99. Command data structure................................................................146
Table 100. Error data structure ......................................................................146
Table 101. Self-test log data structure ...........................................................147
Table 102. Selective self-test log data structure ............................................148
Table 103. S.M.A.R.T. Error Codes..............................................................149
Table 104. Standby (E2h/96h).......................................................................150
Table 105. Standby Immediate (E0h/94h).....................................................151
Table 106. Write Buffer (E8h).......................................................................152
Table 107. Write DMA (CAh/CBh) ..............................................................153
Table 108. Write DMA Ext Command (35h)...............................................155
Table 109. Write Log Ext Command (3Fh)..................................................157
Table 110. Write Long (32h/33h)..................................................................158
Table 111. Write Multiple (C5h)...................................................................160
Table 112. Write Log Ext Command (3Fh)..................................................162
Table 113. Write Sectors command (30h/31h)..............................................164
Table 114. Write Sector(s) Command (34h) ................................................166
Table 115. Write Stream DMA Command (3Ah) .........................................168
Table 116. Write Stream PIO Command (3Bh) ............................................171

Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
1
1.0 General
1.1 Introduction
This specification describes the host interface of HDS725050KLA360.
The interface conforms to the Working Document of Information technology with certain limitations described in 2.0, "Devia-
tions From Standard."
• Serial ATA: High Speed Serialized AT Attachment Revision 1.0a dated on 7 January 2003
• Serial ATA II: Extensions to Serial ATA 1.0a Revision 1.2 dated on 27 August 2004
• AT Attachment with Packet Interface Interface Extension (ATA/ATAPI-7) Revision 4 dated on 23 Deceme-
ber 2003
1.2 Terminology
1.3 Deviations from standard
The device conforms to the referenced specifications with the following deviations:
CheckPower Mode - Check Power Mode command returns FFh to Sector Count Register when the device
is in Idle mode. This command does not support 80h as the return value.
Hard Reset - Hard reset response is not the same as that of power on reset. Refer to section 3.1, “Reset
response” on page 9 for details.
Download - command is aborted when the device is in security locked mode.
Device HDS725050KLA360 hard disk drive
Host Host indicates the system that the device is attached to.

Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
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Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
3
2.0 Registers
In Serial ATA, the host adapter contains a set of registers that shadow the contents of the traditional device regis-
ters, referred to as the Shadow Register Block. Shadow Register Block registers are interface registers used for
delivering commands to the device or posting status from the device. About details, please refer to the Serial ATA
Specification.
In the following cases, the host adapter sets the BSY bit in its shadow Status Register and transmits a FIS to the
device containing the new contents.
• Command register is written in the Shadow Register Block
• Device Control register is written in the Shadow Register Block with a change of state of the SRST bit
• COMRESET is requested
2.1 Alternate Status Register
Table 1: Alternate Status Register
This register contains the same information as the Status Register. The only difference is that reading this register
does not imply interrupt acknowledge or clear a pending interrupt.See “Status Register” on page 7 for the defini-
tion of the bits in this register.
2.2 Command Register
This register contains the command code being sent to the device. Command execution begins immediately after
this register is written. The command set is shown in Table 14: ‘Command Set (1 of 2)” on page 43 and Table
15: ‘Command Set (2 of 2)” on page 44. All other registers required for the command must be set up before writ-
ing to the Command Register.
2.3 Cylinder High Register
This register contains the high order bits of the starting cylinder address for any disk access. At the end of the com-
mand, this register is updated to reflect the current cylinder number.
In LBA Mode this register contains Bits 16–23. At the end of the command, this register is updated to reflect the
current LBA Bits 16–23.
The cylinder number may be from zero to the number of cylinders minus one.
When 48-bit addressing commands are used, the "most recently written" content contains LBA Bits 16-23 and the
"previous content" contains Bits 40-47.
Alternate Status Register
76543210
BSY RDY DF DSC/
SERV DRQ COR IDX ERR

Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
4
2.4 Cylinder Low Register
This register contains the low order 8 bits of the starting cylinder address for any disk access. At the end of the
command, this register is updated to reflect the current cylinder number.
In LBA Mode this register contains Bits 8–15. At the end of the command, this register is updated to reflect the
current LBA Bits 8–15.
The cylinder number may be from zero to the number of cylinders minus one (1).
When 48-bit addressing commands are used, the "most recently written" content contains LBA Bits 8-15 and the
"previous content" contains Bits 32-39.
2.5 Data Register
This register is used to transfer data blocks between the device data buffer and the host. It is also the register
through which sector information is transferred on a Format Track command and the configuration information is
transferred on an Identify Device command.
All data transfers are 16 bits wide, except for ECC byte transfers, which are 8 bits wide. Data transfers are PIO
only.
The register contains valid data only when DRQ = 1 is in the Status Register.
2.6 DeviceControl Register
Table 2: Device Control Register
2.7 Device/Head Register
Table 3: Device Head/Register
This register contains the device and head numbers.
76543210
HOB---1SRST -IEN 0
Bit Definitions
HOB HOB (high order byte) is defined by the 48-bit Address feature set. A write to any Command
Register shall clear the HOB bit to zero.
SRST Software Reset. The device is held at reset when RST = 1. Setting RST = 0 again enables the
device. To ensure that the device recognizes the reset, the host must set RST = 1 and wait for at
least 5 ms before setting RST = 0.
-IEN Interrupt Enable. When IEN = 0, and the device is selected, the device interrupts to the host will
be enabled. When IEN = 1, or the device is not selected, the device interrupts to the host will be
disabled.
76543210
1 L 1 DRV HS3 HS2 HS1 HS0

Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
5
Bit Definitions
2.8 Error Register
Table 4: Error Register
This register contains the status from the last command executed by the device or a diagnostic code. At the comple-
tion of any command, except Execute Device Diagnostic, the contents of this register are always valid even if
ERR = 0 is in the Status Register.
Following a power on, a reset, or completion of an Execute Device Diagnostic command, this register contains a
diagnostic code. See Table 9: ‘Diagnostic codes” on page 10 for the definitions.
2.9 Features Register
This register is command specific. It is used with the Set Features command, the S.M.A.R.T. Function Set com-
mand, and the Format Unit command.
LBinary encoded address mode select. When L = 0, addressing is by CHS mode. When L = 1,
addressing is by LBA mode.
DRV Device. When DRV = 0, device 0 (master) is selected. When DRV = 1, device 1 (Slave) is
selected.
HS3, HS2,
HS1, HS0 Head Select. These four bits indicate binary encoded address of the head. HS0 is the least signifi- cant bit. At command completion, these bits are updated to reflect the currently selected head.
The head number may be from zero to the number of heads minus one.
In LBA mode, HS3 through HS0 contain bits 24-27 of the LBA. At command completion, these
bits are updated to reflect the current LBA bits 24-27.
76543210
ICRCE UNC 0 IDNF 0 ABRT TK0NF AMNF
Bit Definitions
ICRCE
(CRC) Interface CRC Error. When CRC = 1, it indicates that a CRC error has occurred on the data bus during a Ultra DMA transfer.
UNC Uncorrectable Data Error. When UNC = 1 it indicates that an uncorrectable data error has been
encountered.
IDNF
(IDN) ID Not Found. When IDN = 1, it indicates that the requested sector's ID field could not be found.
ABRT
(ABT) Aborted Command. When ABT = 1, it indicates that the requested command has been aborted due to a device status error or an invalid parameter in an output register.
TK0NF
(T0N) Track 0 Not Found. When T0N = 1, it indicates that track 0 was not found during a Recallibrate command.
AMNF
(AMN) Address Mark Not Found. This product does not report this error. This bit is always zero.

Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
6
2.10 Sector Count Register
This register contains the number of sectors of data requested to be transferred on a read or write operation between
the host and the device. If the value in the register is set to 0, a count of 256 sectors (in 28-bit addressing) or 65,536
sectors (in 48-bit addressing) is specified.
If the register is zero at command completion, the command was successful. If it is not successfully completed, the
register contains the number of sectors which need to be transferred in order to complete the request.
The contents of the register are defined otherwise on some commands. These definitions are given in the command
descriptions.
2.11 Status Register
Table 5: Status Register
This register contains the device status. The contents of this register are updated whenever an error occurs and at
the completion of each command.
If the host reads this register when an interrupt is pending, it is considered to be the interrupt acknowledge. Any
pending interrupt is cleared whenever this register is read.
If BSY=1, no other bits in the register are valid.
76543210
BSY DRDY DF DSC/
SERV DRQ CORR IDX ERR
Bit Definitions
BSY Busy. Bit BSY=1 whenever the device is accessing the registers. The host should not read or write
any registers when BSY=1. If the host reads any register when BSY=1, the contents of the Status
Register will be returned.
DRDY
(RDY) Device Ready. RDY=1 indicates that the device is capable of responding to a command. RDY will be set to zero during power on until the device is ready to accept a command. If the device
detects an error while processing a command, RDY is set to zero until the Status Register is read
by the host, at which time RDY is set back to one.
DF Device Fault. This product does not support DF bit. DF bit is always zero.
DSC Device Seek Complete. If DSC=1, it indicates that a Seek has completed and the device head is
settled over a track. Bit DSC is set to 0 by the device just before a Seek begins. When an error
occurs, this bit is not changed until the Status Register is read by the host at which time the bit
again indicates the current Seek complete status. When the device enters into or is in Standby
mode or Sleep mode, this bit is set by the device in spite of the drive not spinning up.
DRQ Data Request. Bit DRQ=1 indicates that the device is ready to transfer a word or byte of data
between the host and the device. The host should not write the Command register when DRQ=1.
SERV (SRV) Service. This product does not support SERV bit.

Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
7
CORR
(COR) Corrected Data. Always 0
IDX Index. IDX=1 once per revolution. Because IDX=1 only for a very short time during each revolu-
tion, the host may not see it set to 1 even if the host is continuously reading the Status Register.
Therefore the host should not attempt to use IDX for timing purposes.
ERR Error. ERR=1 indicates that an error occurred during execution of the previous command. The
Error Register should be read to determine the error type. The device sets bit ERR=0 when the
next command is received from the host.

Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
8

Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
9
3.0 General operation
3.1 Reset response
ATA has the following three types of resets:
The actions of each reset are shown in the table below.
O – execute X – does not execute
Notes:
Power On Reset (POR) The device executes a series of electrical circuitry diagnostics, spins up the
head disk assembly, tests speed and other mechanical parametric, and sets
default values.
COMRESET COMRESET is issued in Serial ATA bus. The device resets the interface
circuitry as well as Soft Reset.
Soft Reset (Software Reset) The SRST bit in the Device Control Register is set and then is reset. The device
resets the interface circuitry according to the Set Features requirement.
Table 7: Reset response table
POR hard reset soft reset
Aborting Host interface -OO
Aborting Device operation - (*1) (*1)
Initialization of hardware OXX
Internal diagnostic OXX
Spinning spindle OXX
Initialization of registers (*2) OOO
DASP handshake OOX
PDIAG handshake OOO
Reverting programmed parameters to default
Number of CHS (set by Initialize
Device Parameters)
Multiple mode
Write Cache
Read look-ahead
ECC bytes
O (*3) (*3)
Power mode (*5) (*4) (*4)
Disable Standby timer(*5) OXX
(*1) Execute after the data in write cache has been written.
(*2) The default value on POR is shown in Table 8: “Default Register Values” on page 10.
(*3) The Set Features command with Feature register = CCh enables the device to revert these parameters to the
power on defaults.
(*4) In the case of Sleep mode, the device goes to Standby mode. In other cases, the device does not change current
mode.
(*5) Idle when Power-Up in Standby feature set is disabled. Standby when Power-Up in Standby feature set is
enabled.