K6610007
Rev.5
02.14.’03
- 66 -
(2) Summary SMART Error Log [Log Sector Address = 01h]
The last five errors that device reported are gathered in summary SMART error log. The following table
defines the 512 bytes that make up the summary SMART error log. Error log data structures includes UNC
errors, IDNF errors for which the address requested was valid, servo errors, write fault errors, etc. They do
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 invalid addresses.
Table 6.13 Summary SMART Error Log
Byte Description
0
SMART error log version
The value of the SMART error log version is 01h.
1
Error log index
The error log index indicates the error log data structure representing the most recent
error. Only values 1 through 5 are valid.
2-91
First error log data structure
92-181
Second error log data structure
182-271
Third error log data structure
272-361
Fourth error log data structure
362-451
Fifth error log data structure
452-453
Device error count
This contains the total number of errors attributable to the device that have been
reported by the device during the life of the device. These errors include UNC errors,
IDNF errors for which the address requested was valid, servo errors, write fault errors,
etc. This count is not include errors attributed to the receipt of faulty commands such
as commands codes not implemented by the device or requests with invalid
parameters or invalid addresses. If the maximum value for this field is reached, the
count remains at the maximum value when additional errors are encountered and
logged.
454-510 Reserved
511
Data structure checksum
This is the two's complement of the sum of the first 511 bytes in the data structure.
Each byte is added with unsigned arithmetic, and overflow is ignored.
Error log data structure
An error log data structure is presented for each of the last five errors reported by the device. These error log
data structure entries are viewed as a circular buffer. That is, the first error shall create the first error log data
structure; the second error, the second error log structure; etc. The sixth error creates an error log data
structure that replaces the first error log data structure; the seventh error replaces the second error log
structure, etc. The error log pointer indicates the most recent error log structure. If fewer than five errors
have occurred, the unused error log structure entries are zero filled. The following table describes the
content of a valid error log data structure.
Table 6.14
Error log data structure
Byte Description
n
~ n+11
First command data structure
n+12
~ n+23 Second command data structure
n+24
~ n+35 Third command data structure
n+36
~ n+47 Fourth command data structure
n+48
~ n+59 Fifth command data structure
n+60
~ n+89 Error data structure
