Fujitsu MHT2020AT, Product Manual

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Interface
5-80 C141-E192-01EN
•
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, SC register = 01h) 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
• Self-test number
Indicates the type of self-test executed.
•
Self-test execution status
Same as byte 16Bh of the attribute value.
•
Self-test index
If this is "00h", it indicates the status where the self-test has never been
executed.
• 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.