Hitachi HTS541680J9AT00 Specifications - Page 161

S.M.A.R.T. Log Directory, 39.5 S.M.A.R.T. error log sector

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Travelstar 5K160 (PATA) Hard Disk Drive Specification 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 Bytes Offset S.M.A.R.T. Logging Version 2 00h Number of sectors in the log at log address 1 1 02h Reserved 1 03h Number of sectors in the log at log address 2 1 04h Reserved 1 05h ... ... ... Number of sectors in the log at log address 255 1 1FEh Reserved 1 1FFh 512 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 Bytes Offset S.M.A.R.T. error log version 1 00h Error log pointer 1 01h 1st error log data structure 90 02h 2nd error log data structure 90 5Ch 3rd error log data structure 90 B6h 4th error log data structure 90 110h 5th error log data structure 90 16Ah Device error count 2 1C4h Reserved 57 1C6h Data structure checksum 1 1FFh 512 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. 161/188

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Travelstar 5K160 (PATA) Hard Disk Drive Specification
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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
Bytes
Offset
S.M.A.R.T. Logging Version
2
00h
Number of sectors in the log at log address 1
1
02h
Reserved
1
03h
Number of sectors in the log at log address 2
1
04h
Reserved
1
05h
…
…
…
Number of sectors in the log at log address 255
1
1FEh
Reserved
1
1FFh
512
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
Bytes Offset
S.M.A.R.T. error log version
1
00h
Error log pointer
1
01h
1st error log data structure
90
02h
2nd error log data structure
90
5Ch
3rd error log data structure
90
B6h
4th error log data structure
90
110h
5th error log data structure
90
16Ah
Device error count
2
1C4h
Reserved
57
1C6h
Data structure checksum
1
1FFh
512
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.