Travelstar 5K100 Hard Disk Drive Specification
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13.39.4 S.M.A.R.T Log Directory
Table 121 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.
Table 122: S.M.A.R.T. Log Director
13.39.4.1 Data Structure Revision Number
This value is the same as the value used in the Device Attributes Values Data Structure.
13.39.4.2 Individual Thresholds Data Structure
The following defines the 12 bytes that make up the information for each Threshold entry in the Device Attribute
Thresholds Data Structure. Attribute entries in the Individual Threshold Data Structure are in the same order and
correspond to the entries in the Individual Attribute Data Structure.
13.39.4.3 Attribute ID Numbers
Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures.
13.39.4.4 Attribute Threshold
These values are preset at the factory and are not meant to be changeable. However, the host might use the
"S.M.A.R.T. Write Attribute Threshold" subcommand to override these preset values in the Threshold sectors.
Description
Bytes
Offset
S.M.A.R.T. Logging Version
2
01h
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
512
Table 123: Individual Threshold Data Structure
Description Byte Offset Format
Attribute ID Number (01h to FFh) 1 00h binary
Attribute Threshold (for comparison with
Attribute Values from 00h to FFh)
1 01h binary
00h - "always passing" threshold value to
be used for code test purposes
01h - minimum value for normal operation
FDh - maximum value for normal operation
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
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