Figure 71 Extended Error Log Data Structure; Figure 72 Command Data Structure - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications

2.5 inch ata/ide hard disk drive
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data structure entries are viewed as a circular buffer. The fifth error shall create an error log structure that replaces
the first error log data structure. The next error after that shall create an error log data structure that replaces the
second error log structure, etc.
Unused error log data structures shall be filled with zeros.
Data format of each error log structure is shown below.
Description
1st command data structure
2nd command data structure
3rd command data structure
4th command data structure
5th command data structure
Error data structure

Figure 71 Extended Error log data structure

Command data structure: Data format of each command data structure is shown below.
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/Head 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.

Figure 72 Command data structure

Error data structure: Data format of error data structure is shown below
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/Head register
Travelstar 5K160 (PATA) Hard Disk Drive Specification
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Bytes Offset
18
00h
18
12h
18
24h
18
36h
18
48h
34
5Ah
124
Bytes Offset
1
00h
1
01h
1
02h
1
03h
1
04h
1
05h
1
06h
1
07h
1
08h
1
09h
1
0Ah
1
0Bh
1
0Ch
1
0Dh
4
0Eh
18
.
Bytes Offset
1
00h
1
01h
1
02h
1
03h
1
04h
1
05h
1
06h
1
07h
1
08h
1
09h
1
0Ah

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