Self-Test Log Data Structure - Hitachi T7K250 - Deskstar - Hard Drive Specifications

The state field contains a value indicating the device state when command was issued to the device.
Value State
x0h Unknown
x1h Sleep
x2h Standby
x3h Active/Idle
x4h S.M.A.R.T. Off-line or Self-test
x5h-xAh Reserved
xBh-xFh Vendor specific
The value of 'x' is vendor specific

12.43.6 Self-test log data structure

The following table 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 136: 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 index points to the most recent descriptor. When there is no descriptor, the value is 0. When there
are one or more descriptors, 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
Deskstar T7K250 Hard Disk Drive Specification
211
Offset
00h
1FAh
1FCh
1FDh
1FFh