Hitachi HTS541616J9SA00 Specifications page 143

invalid for threshold value
FEh -
"always failing" threshold value to be used
FFh -
for code test purposes
Reserved (00h)
Total Bytes
Figure 87 Individual Threshold Data Structure
14.40.3.3
Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures.
14.40.3.4
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
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.
S.M.A.R.T. Log Directory
14.40.4
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
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 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.
S.M.A.R.T. error log sector
14.40.5
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
S.M.A.R.T. error log version
Error log pointer
st
1 error log data structure
nd
2 error log data structure
rd
3 error log data structure
th
4 error log data structure
th
5 error log data structure
Device error count
Reserved
Travelstar 5K160 (SATA) Hard Disk Drive Specification
Attribute ID Numbers
Attribute Threshold
Data Structure Checksum
Bytes
2
1
1
1
1
...
1
1
512
143/167
10
12
Offset
00h
02h
03h
04h
05h
...
1FEh
1FFh
02h binary
Bytes Offset
1 00h
1 01h
90 02h
90 5Ch
90 B6h
90 110h
90 16Ah
2 1C4h
57 1C6h