Deskstar T7K500 Hard Disk Drive Specification
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12.17.2.3.2 Data format of command data structure
Table 99: Command data structure
Note: bits (7:0) refer to the most recently written contents of the register. Bits (15:8) refer to the contents of the reg-
ister prior to the most recent write to the register
12.17.2.3.3 Data format of error data structure
Table 100: Error data structure
Description Bytes Offset
Device Control register 1 00h
Features register (7:0) (see Note) 1 01h
Features register (15:8) 1 02h
Sector count register(7:0) 1 03h
Sector count register(15:8) 1 04h
Sector number register(7:0) 1 05h
Sector number register(15:8) 1 06h
Cylinder Low register (7:0) 1 07h
Cylinder Low register (15:8) 1 08h
Cylinder High register (7:0) 1 09h
Cylinder High register (15:8) 1 0Ah
Device/Head register 1 0Bh
Command register 1 0Ch
Reserved 1 0Dh
Timestamp (milliseconds from Power-on) 4 0Eh
18
Description Bytes Offset
Reserved 1 00h
Error register (7:0) 1 01h
Sector count register(7:0)(See Note) 1 02h
Sector count register(15:8)(See Note) 1 03h
Sector number register(7:0) 1 04h
Sector number register(15:8) 1 05h
Cylinder Low register (7:0) 1 06h
Cylinder Low register (15:8) 1 07h
Cylinder High register (7:0) 1 08h
Cylinder High register (15:8) 1 09h
Device/Head register 1 0Ah
Status register 1 0Bh
Extended error data (vendor specific) 19 0Ch
State 1 1Fh
Life stamp (hours) 2 20h
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