Table 76 Command Data Structure; Table 77 Error Data Structure - Hitachi HTS542516K9SA00 Specifications

Command data structure:
Description
Device Control register
Features register (7:0) (see Note)
Features register (15:8)
Sector count register (7:0)
Sector count register (15:8)
Sector number register (7:0)
Sector number register (15:8)
Cylinder Low register (7:0)
Cylinder Low register (15:8)
Cylinder High register (7:0)
Cylinder High register (15:8)
Device register
Command register
Reserved
Timestamp (milliseconds from Power-on)
Note: bits (7:0) refer to the most recently written contents of the register. Bits (15:8) refer to the
contents of the register prior to the most recent write to the register.

Table 76 Command data structure

Error data structure:
Description
Reserved
Error register
Sector count register (7:0) (see Note)
Sector count register (15:8) (see Note)
Sector number register (7:0)
Sector number register (15:8)
Cylinder Low register (7:0)
Cylinder Low register (15:8)
Cylinder High register (7:0)
Cylinder High register (15:8)
Device register
Status register
Extended error data (vendor specific)
State
Life timestamp (hours)
Note: bits (7:0) refer to the contents if the register is read with bit 7 of the Device Control register
cleared to zero. Bits (15:8) refer to the contents if the register is read with bit 7 of the Device Control
register set to one.

Table 77 Error data structure

Data format of each command data structure is shown below.
Data format of error data structure is shown below.
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5K250 (SATA) OEM Specification
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1
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Bytes Offset
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34
00h
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0Ah
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0Ch
0Dh
0Eh
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0Ah
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1Fh
20h