IBM DARA-206000 Hard Drive Specifications - Page 182

Self-test log data structure

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12.31.5 Self-test log data structure The following defines the 512 bytes that make up the Self-test log sector. All multi-byte fields shown in these data structures follow the ATA/ATAPI-4 specifications for byte ordering. Description Data structure revision Self test number Self test execution status Life time power on hours Self test failure check point LBA of first failure Vendor specific ... Vendor specific Self test log pointer Reserved Data structure checksum Note: n is 0 through 20 Figure 123. Self-test log data structure Bytes Offset 2 00h 1 n*18h+02h 1 n*18h+03h 2 n*18h+04h 1 n*18h+06h 4 n*18h+07h 15 n*18h+0Bh 2 1FAh 1 1FCh 2 1FDh 1 1FFh 512 The data structure contains the descriptor of Self-test that the device has performed. Each descriptor is 24 bytes long and the self-test data structure is capable to contain up to 21 descriptors. After 21 descriptors has been recorded, the oldest descriptor will be overwritten with new descriptor. Self-test log pointer points the most recent descriptor. When there is no descriptor the value is 0. When there is descriptor(s) the value is 1 through 21. 172 OEM Specifications of DARA-2xxxxx 2.5 inch H D D Rev 2.1

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12.31.5
Self-test log data structure
The following defines the 512 bytes that make up the Self-test log sector.
All multi-byte fields shown in
these data structures follow the ATA/ATAPI-4 specifications for byte ordering.
Description
Bytes
Offset
Data structure revision
2
00h
Self test number
1
n*18h+02h
Self test execution status
1
n*18h+03h
Life time power on hours
2
n*18h+04h
Self test failure check point
1
n*18h+06h
LBA of first failure
4
n*18h+07h
Vendor specific
15
n*18h+0Bh
...
Vendor specific
2
1FAh
Self test log pointer
1
1FCh
Reserved
2
1FDh
Data structure checksum
1
1FFh
512
Note: n is 0 through 20
Figure 123. Self-test log data structure
The data structure contains the descriptor of Self-test that the device has performed. Each descriptor is 24
bytes long and the self-test data structure is capable to contain up to 21 descriptors.
After 21 descriptors has been recorded, the oldest descriptor will be overwritten with new descriptor.
Self-test log pointer points the most recent descriptor. When there is no descriptor the value is 0. When there
is descriptor(s) the value is 1 through 21.
172
OEM Specifications of DARA-2xxxxx 2.5 inch HDD Rev 2.1