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5.3 Host Commands
C141-E224 5-65
Table 5.20 Data format of SMART Comprehensive Error Log
Byte First sector Next sector
00 SMART Error Logging 01h Reserved
01 Index Pointer Latest Error Data Structure Reserved
02…5B
1
st
Error Log Data Structure
Error Log Data Structure 5n+1
5C…B5
2
nd
Error Log Data Structure2
Error Log Data Structure 5n+2
B6…10F
3
rd
Error Log Data Structure3
Error Log Data Structure 5n+3
110…169
4
th
Error Log Data Structure4
Error Log Data Structure 5n+4
16A…1C3
5
th
Error Log Data Structure5
Error Log Data Structure 5n+5
1C4…1C5 Total number of drive errors Reserved
1C6…1FE Reserved Reserved
1FF Check sum Check sum
“n” indicates sector number in the Error Log. The first sector is 0.
• SMART Self-Test
The host computer can issue the SMART Execute Off-line Immediate sub-
command (Features field = D4h) and cause the device to execute a self-test. When
the self-test is completed, the device saves the SMART self-test log to the disk
medium.
The host computer can issue the SMART Read Log Sector sub-command
(Features field = D5h, Sector Number field = 06h, Sector Count field = 01h) and
can read the SMART self-test log.