Figure 111 Smart Log Directory; Figure 112 S.m.a.r.t. Error Log Sector - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications

2.5 inch ata/ide hard disk drive
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14.39.3.3 Attribute ID Numbers
Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures.
14.39.3.4 Attribute Threshold
These values are preset at the factory and are not meant to be changeable. However, the host might use " S.M.A.R.T.
Write Attribute Threshold" subcommand to override these preset values in the Threshold sectors.
14.39.3.5 Data Structure Checksum
The Data Structure Checksum is the 2's compliment of the result of a simple 8-bit addition of the first 511 bytes in
the data structure.
14.39.4 S.M.A.R.T. Log Directory
The following figure defines the 512 bytes that make up the S.M.A.R.T. Log Directory. The S.M.A.R.T. Log
Directory is on S.M.A.R.T. Log Address zero and is defined as one sector long.
Description
S.M.A.R.T. Logging Version
Number of sectors in the log at log address 1
Reserved
Number of sectors in the log at log address 2
Reserved
...
Number of sectors in the log at log address 255
Reserved

Figure 111 SMART Log Directory

The value of the SMART Logging Version word shall be 01h. The logs at log addresses 80-9Fh are defined as 16
sectors long.
14.39.5 S.M.A.R.T. error log sector
The following defines the 512 bytes that make up the S.M.A.R.T. error log sector. All multi-byte fields shown in
these data structures follow the ATA/ATAPI-7 specifications for byte ordering.
Description
S.M.A.R.T. error log version
Error log pointer
1st error log data structure
2nd error log data structure
3rd error log data structure
4th error log data structure
5th error log data structure
Device error count
Reserved
Data structure checksum

Figure 112 S.M.A.R.T. error log sector

14.39.5.1 S.M.A.R.T. error log version
This value is set to 01h.
14.39.5.2 Error log pointer
This points the most recent error log data structure. Only values 1 through 5 are valid.
14.39.5.3 Device error count
This field contains the total number of errors. The value will not roll over.
Travelstar 5K160 (PATA) Hard Disk Drive Specification
Bytes
2
1
1
1
1
...
1
1
512
161 / 188
Offset
00h
02h
03h
04h
05h
...
1FEh
1FFh
Bytes Offset
1
00h
1
01h
90
02h
90
5Ch
90
B6h
90
110h
90
16Ah
2
1C4h
57
1C6h
1
1FFh
512

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