Self-Test Log Data Structure; Table 121 Self-Test Log Data Structure - Hitachi Travelstar 2.5 inch SATA HTS722020K9A300 Oem Specification

Self-test log data structure

14.39.6
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
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

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.
7K200 SATA OEM Specification
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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