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Toshiba Corporation Digital Media Network Company
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Extended Self-test log data structure
Byte First sector Subsequent sectors
0 Self-test log data structure revision number Reserved
1 Reserved Reserved
2 Self-test descriptor index (7:0) Reserved
3 Self-test descriptor index (15:8) Reserved
4-29 Descriptor entry 1 Descriptor entry 18n+1
30-55 Descriptor entry 2 Descriptor entry 18n+2
…. .... ....
472-497 Descriptor entry 18 Descriptor entry 18n+18
498-499 Vendor specific Vendor specific
500-510 Reserved Reserved
511 Data structure checksum Data structure checksum
n is the sector number within the log. The first sector is sector zero
This log is viewed as a circular buffer. The first entry will begin at byte 4, the second entry will begin at byte 30
and so on until the nineteen entry, that will replace the first entry. Then, the twenty entry will replace the
second entry, and so on. If fewer than 18 self-tests have been performed by the device, the unused descriptor
entries will be filled with zeroes.
11.8.43.3.1 Self-test descriptor index
The Self-test descriptor index indicates the most recent self-test descriptor. If there have been no self-tests, the
Self-test descriptor index is set to zero. Valid values for the Self-test descriptor index are zero to 18.
11.8.43.3.2 Self-test log data structure revision number
The value of the self-test log data structure revision number is 01h.
11.8.43.3.3 Extended Self-test log descriptor entry
The content of the self-test descriptor entry is shown in the following table..
Extended Self-test log descriptor entry
Byte Descriptions
n Content of the LBA Low register.
n+1 Content of the self-test execution status byte.
n+2 Life timestamp (least significant byte).
n+3 Life timestamp (most significant byte).
n+4 Content of the self-test failure checkpoint byte.
n+5 Failing LBA (7:0).
n+6 Failing LBA (15:8).
n+7 Failing LBA (23:16).
n+8 Failing LBA (31:24).
n+9 Failing LBA (39:32).
n+10 Failing LBA (47:40).
n+1 - n+23 Vendor specific.
Content of the LBA Low register shall be the content of the LBA Low register when the nth self-test
subcommand was issued (see 11.8.42.5 ).
Content of the self-test execution status byte shall be the content of the self-test execution status byte when the
nth self-test was completed (see 11.8.42.5).