Self-Test Log Data Structure; Selective Self-Test Log Data Structure; Table 124. Self-Test Log Data Structure - Hitachi 7K100 - Travelstar - Hard Drive Specifications

13.39.6 Self-test log data structure

The following defines the 512 bytes that make up the Self-test log sector. All multibyte fields shown in these data
structures follow the ATA/ATAPI-6 specifications for byte ordering.
Table 124: Self-test log data structure
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
The data structure contains the descriptor of the 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 the new descriptor.
The self-test log pointer points to the most recent descriptor. When there is no descriptor, the value is 0. When there
are descriptor(s), the value is 1 through 21.

13.39.7 Selective self-test log data structure

The Selective self-test log is a log that may be both written and read by the host. This log allows the host to select
the parameters for the self-test and to monitor the progress of the self-test. The following table defines the contents
of the Selective self-test log which is 512 bytes long. All multi-byte fields shown in these data structures follow the
specifications for byte ordering.
Description
Data structure revision
Starting LBA for test span 1
Ending LBA for test span 1
Starting LBA for test span 2
Ending LBA for test span 2
Starting LBA for test span 3
Ending LBA for test span 3
Starting LBA for test span 4
Ending LBA for test span 4
Starting LBA for test span 5
Byte
2
1 n*18h+02h
1 n*18h+03h
2 n*18h+04h
1 n*18h+06h
4 n*18h+07h
15 n*18h+08h
2
1
2
1
512
Bytes
2
8
8
8
8
8
8
8
8
8
Travelstar 7K100 Hard Disk Drive Specification
179
Offset
00h
1FAh
1FCh
1FDh
1FFh
Offset Read/Write
00h R/W
02h R/W
0Ah R/W
12A R/W
1Ah R/W
22h R/W
2Ah R/W
32h R/W
3Ah R/W
42h R/W