Read Stream Error Log; Table 102: Read Stream Error Log - Hitachi HTS542525K9SA00 Specifications

12.17.3.1 Self-test log data structure revision number
The value of this revision number shall be 01h.
12.17.3.2 Self-test descriptor index
This indicates the most recent self-test descriptor. If there have been no self-tests, this is set to zero. Valid values for
the Self-test descriptor index are 0 to 18.
12.17.3.3 Extended Self-test log descriptor entry
The content of the self-test descriptor entry is shown below.
Self-test number
Self-test execution status
Power-on life timestamp in hours
Self-test failure check point
Failing LBA (7:0)
Failing LBA (15:8)
Failing LBA (23:16)
Failing LBA (31:24)
Failing LBA (39:32)
Failing LBA (47:40)
Vendor specific

12.17.4 Read Stream Error Log

Table 109 defines the format of the Read Stream Error log. Entries are placed into the Read Stream Error log only
when the SE bit is set to one in the Status Register. The 512 bytes returned shall contain a maximum of 31 error
entries. The Read Stream Error Count shall contain the total number of Read Stream Errors detected since the last
successful completion of the Read Log Ext command with LBA Low register set to 22h. This error count may be
greater than 31, but only the most recent 31 errors are represented by entries in the log. If the Read Stream Error
Count reaches the maximum value that can be represented after the next error is detected the Read Stream Error
Count shall remain at the maximum value. After successful completion of a Read Log Ext command with the LBA
Low Register set to 22h, the Read Stream Error Log shall be reset to a power-on or hardware reset condition, with
the Error Log Index and Read Stream Error Count cleared to zero. The Read Stream Error Log is not preserved
across power cycles and hardware reset.
Table 103: Read Stream Error Log
Description
Structure Version
Error Log Index
Read Stream Error Log Count
Reserved
Read Stream Error Log Entry #1
Read Stream Error Log Entry #31
Description
Bytes
1
1
2
12
16
16
Deskstar 7K160 Hard Disk Drive Specification
178
Bytes
1
1
2
1
1
1
1
1
1
1
15
26
Offset
00h
01h
02h
04h
20h
1F0h
Offset
00h
01h
02h
04h
05h
06h
07h
08h
09h
0AH
0BH