Hitachi 7K320 Specifications - Page 154

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

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14.40.3.3 Attribute ID Numbers 7K320 (SATA) OEM Specification 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 Following table 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 Table 118 SMART Log Directory Bytes 2 1 1 1 1 ... 1 1 512 Offset 00h 02h 03h 04h 05h ... 1FEh 1FFh 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 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 1 01h 90 02h 90 5Ch 90 B6h 90 110h 90 16Ah Device error count 2 1C4h Reserved 57 1C6h Data structure checksum 1 1FFh 512 Table 119 S.M.A.R.T. error log sector 14.40.5.1 S.M.A.R.T. error log version This value is set to 01h. Page 154 of 176

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7K320 (SATA) OEM Specification
Page 154 of 176
mbers
eshold
cksum
14.40.3.3
Attribute ID Nu
Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures.
14.40.3.4
Attribute Thr
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 Che
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
Following table 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
Table 118 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
Data structure checksum
1
1FFh
512
Table 119 S.M.A.R.T. error log sector
14.40.5.1
S.M.A.R.T. error log version
This value is set to 01h.