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Travelstar 5K160 (SATA) Hard Disk Drive Specification
143/167
FEh -
invalid for threshold value
FFh -
“always failing” threshold value to be used
for code test purposes
Reserved (00h) 10 02h binary
Total Bytes 12
Figure 87 Individual Threshold Data Structure
14.40.3.3 Attribute ID Numbers
Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures.
14.40.3.4 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.
14.40.3.5 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.
14.40.4 S.M.A.R.T. Log Directory
Figure 95 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 88 SMART Log Directory
The value of the S.M.A.R.T. Logging Version word shall be 01h. The logs at log addresses 80-9Fh
are defined as 16 sectors long.
14.40.5 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-6 specifications for byte ordering.
Description Bytes Offset
S.M.A.R.T. error log version 1 00h
Error log pointer 1 01h
1
st
error log data structure 90 02h
2
nd
error log data structure 90 5Ch
3
rd
error log data structure 90 B6h
4
th
error log data structure 90 110h
5
th
error log data structure 90 16Ah
Device error count 2 1C4h
Reserved 57 1C6h