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5-80 C141-E145-02EN
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SMART Self Test
The host computer can issue the SMART Execute Off-line Immediate sub-
command (FR Register = 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 (FR
Register = D5h, SN Register = 06h) and can read the SMART self test log.
Table 5.12 SMART self test log data format
Byte Item
00, 01 Self test log data structure
02 Self test log 1 Self test number (SN Register Value)
03 Self test execution status
04, 05 Life time. Total power-on time [hours]
06 Self test error No.
07 to 0A Error LBA
0B to 19 Vendor unique
1A to 1F9 Self test log 2 to 21 (Each log data format is the same as that in
byte 02 to 19.)
1FA, 1FB Vendor unique
1FC Self test index
1FD, 1FE Reserved
1FF Check sum
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Self-test number
Indicates the type of self-test executed.
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Self-test execution status
Same as byte 16Bh of the attribute value.
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Self-test index
If this is "00h", it indicates the status where the self-test has never been
executed.
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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 from the top.