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7K200 SATA OEM Specification 

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14.39.6 

Self-test log data structure   

The following defines the 512 bytes that make up the Self-test log sector. All multi-byte fields 
shown in these data structures follow the ATA/ATAPI-7 specifications for byte ordering.   

Description Bytes 

Offset 

Data structure revision 

2 

00h

Self-test number 

1 

n*18h+02h

Self-test execution status 

1 

n*18h+03h

Life time power on hours 

2 

n*18h+04h

Self-test failure check point 

1 

n*18h+06h

LBA of first failure 

4 

n*18h+07h

Vendor specific 

15 

n*18h+0Bh

... 

  

 

Vendor specific 

2 

1FAh

Self-test log pointer 

1 

1FCh

Reserved 

2 1FDh

Data structure checksum 

1 

1FFh

  

512   

Note: n is 0 through 20   

Table 121 Self-test log data structure   

The data structure contains the descriptor of 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 new 

descriptor.  

Self-test log pointer points the most recent descriptor. When there is no descriptor the value is 0. 
When there is descriptor(s) the value is 1 through 21.