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5.3 Host Commands
C141-E120-02EN 5-73
•
Check sum
Two’s complement of the lower byte, obtained by adding 511-byte data one
byte at a time from the beginning.
•
Insurance failure threshold
The limit of a varying attribute value. The host compares the attribute values
with the thresholds to identify a failure.
Table 5.10 Log Directory Data Format
Byte Item
00
01
SMART Logging Version
02 Number of sectors of Address "01h"
03
0B
Reserved
0C Number of sectors of Address "06h"
0D
FF
Reserved
100 Number of sector
101
Address 80h
Reserved
102
13F
Address 81h
Address 9Fh
"102" and "13F" are both the same
format as "100-101"
140
1FF
Reserved
•
SMART error logging
If an unrecoverable error is detected during execution of a command received by
the device from the host computer, the device saves the SMART error log on the
disk medium.
The host computer can issue the SMART Read Log Sector sub-command (FR
register = D5h, SN register = 01h) and read the SMART error log.