Self-Test Log Data Structure; Table 120: Self-Test Log Data Structure - Hitachi IC25N040ATMR04-0 - Travelstar 40GB Laptop Hard Drive 9.5mm 2.5 Inch Notebook HDD Specifications

13.38.5 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-5 specifications for byte ordering.

Table 120: 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.
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
Travelstar 80GN Hard Disk Drive Specification
174
Offset
00h
1FAh
1FCh
1FDh
1FFh