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11.23.2 Extended Comprehensive SMART Error log
Table 147 defines the format of each of the sectors that comprise the Extended Comprehensive SMART error log.
Error log data structure shall not include errors attributed to the receipt of faulty commands such as command codes
not implemented by the device or requests with invalid parameters or in valid addresses.
Description
SMART error log version
Reserved
Error log index (7:0)
Error log index (15:8)
1st error log data structure
2nd error log data structure
3rd error log data structure
4th error log data structure
Device error count
Reserved
Data structure checksum
Table 147 Extended Comprehensive SMART Error Log
11.23.2.1
Error log version
The value of this version shall be 01h.
11.23.2.2
Error log index
This indicates the error log data structure representing the most recent error. If there have been no error log entries,
it is cleared to 0. Valid values for the error log index are 0 to 4.
Extended Error log data structure
11.23.2.3
An error log data structure shall be presented for each of the last four errors reported by the device.
These error log data structure entries are viewed as a circular buffer. The fifth error shall create an error log structure
that replaces the first error log data structure. The next error after that shall create an error log data structure that
replaces the second error log structure, etc.
Unused error log data structures shall be filled with zeros.
Data format of each error log structure is shown below.
Description
1st command data structure
2nd command data structure
3rd command data structure
4th command data structure
5th command data structure
Error data structure
Table 148 Extended Error log data structure
Western Digital Hard Disk Drive OEM Specification
Bytes
124
124
124
124
512
Bytes
Offset
18
18
18
18
18
34
5Ah
124
177
Offset
1
00h
1
01h
1
02h
1
03h
04h
80h
FCh
178h
2
1F4h
9
1F6h
1
1FFh
00h
12h
24h
36h
48h
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