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7K200 SATA OEM Specification
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14.39.6 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-7 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
Table 121 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.