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5.3 Host Commands
C141-E145-02EN 5-79
•
Command data structure
Indicates the command received when an error occurs.
•
Error data structure
Indicates the status register when an error occurs.
•
Total number of drive errors
Indicates total number of errors registered in the error log.
•
Checksum
Two's complementary for the lowest-order 1 byte that is obtained by adding 1
byte after another for as many as 511 bytes beginning from the top of the
structure.
•
Status
Bits 0 to 3: Indicates the drive status when received error commands
according to the following table.
Bits 4 to 7: Vendor unique
Status Meaning
0 Unclear status
1 Sleep status
2 Standby status
3 Active status or idle status (BSY bit = 0)
4 Off-line data collection being executed
5 to F Reserved
Byte First sector Next sector
00h SMART Error Logging 01h Reserved
01h Index Pointer Latest Error Data Structure. Reserved
02h...5Bh 1
st
Error Log Data Structure Data Structure 5n + 1
5Ch...B5h 2
nd
Error Log Data Structure Data Structure 5n + 2
B6h...10Fh 3
rd
Error Log Data Structure Data Structure 5n + 3
110h...169h 4
th
Error Log Data Structure Data Structure 5n + 4
16Ah...1C3h 5
th
Error Log Data Structure Data Structure 5n + 5
1C4h...1C5h Total Error Count Reserved
1C6h...1FEh Reserved Reserved
1FFh Checksum Checksum