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Toshiba Corporation Digital Media Network Company
Page 114 of 153
© 2003, Copyright TOSHIBA Corporation All Rights Reserved
Comprehensive error log
Byte First sector Subsequent sectors
0 SMART error log version Reserved
1 Error log index Reserved
2-91 First error log data structure Data structure 5n+1
92-181 Second error log data structure Data structure 5n+2
182-271 Third error log data structure Data structure 5n+3
272-361 Fourth error log data structure Data structure 5n+4
362-451 Fifth error log data structure Data structure 5n+5
452-453 Device error count Reserved
454-510 Reserved Reserved
511 Data structure checksum Data structure checksum
n is the sector number within the log. The first sector is sector zero
11.8.42.6.3.1 Error log version
The value of the error log version byte shall be set to 01h.
11.8.42.6.3.2 Error log index
The error log index indicates the error log data structure representing the most recent error. If there have been
no error log entries, the error log index is set to zero. Valid values for the error log index are zero to 255.
11.8.42.6.3.3 Error log data structure
The error log is viewed as a circular buffer. The device may support from two to 51 error log sectors. When the
last supported error log sector has been filled, the next error shall create an error log data structure that replaces
the first error log data structure in sector zero. The next error after that shall create an error log data structure
that replaces the second error log data structure in sector zero. The sixth error after the log has filled shall
replace the first error log data structure in sector one, and so on.
The error log index indicates the most recent error log data structure. Unused error log data structures shall be
filled with zeros.
The content of the error log data structure entries is defined in 11.8.42.6.2.2.
11.8.42.6.3.4 Device error count
The device error count field is defined in 11.8.42.6.2.5.
11.8.42.6.3.5 Data structure checksum
The data structure checksum is defined in 11.8.42.6.2.6.
11.8.42.6.4 Self-test log sector
The following Table defines the 512 bytes that make up the SMART self-test log sector.