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C141-E116-01EN 5 - 61
Table 5.13 Self Test log data structure
Byte Description
0 to 1 Data Structure Revision Number = 0x0001
1st Descriptor Entry
2 Self Test Number
3 Self Test Execution Status
4 to 5 Life time power on hours
6 Self Test Error No.
7 to 10 Error LBA
11 to 25 Vender Specific bytes
26 to 49 2nd Descriptor Entry
……
482 to 505 21st Descriptor Entry
506 to 507 Vender Specific
508 Self Test Index
509 to 510 Reserved
511 Checksum
• Self Test Number
This byte shows executed Self Test Number.
• Self Test Execution Status
Refer to explanation of Attribute Byte 16Bh.
• Self Test Index
When it is “00h”, it means that Self Test has not been performed.
• Check Sum
Twos complement of the lower byte, obtained by adding 511-byte data one by at a
time from the beginning.
*16 Command data structure
It indicates that the device has received structure of the command when the drive occurs the
error.
*17 Error data structure
It indicates that structure of the ATA taskfile register which the drive occurs the error.
*18 Total error count
It indicates that the total count of the error registered in the error log.
*19 Check sum
Twos complement of the lower byte, obtained by adding 511-byte data one by at a time from
the beginning.