5.3 Host Commands

Bit

Meaning

3If this bit 1, it indicates the attribute that represents an error rate.

4If this bit 1, it indicates the attribute that represents the number of occurrences.

5If this bit 1, it indicates the attribute that can be collected/saved even if the drive fault prediction function is disabled.

6 to 15

Reserve bit

Current attribute value

The current attribute value is the normalized raw attribute data. The value varies between 01h and 64h. The closer the value gets to 01h, the higher the possibility of a failure. The device compares the attribute values with thresholds. When the attribute values are larger than the thresholds, the device is operating normally.

Attribute value for the worst case so far

This is the worst attribute value among the attribute values collected to date. This value indicates the state nearest to a failure so far.

Raw attribute value

Raw attributes data is retained.

Off-line data collection status

Bits 0 to 6: Indicates the situation of off-line data collection according to the table below.

Bit 7: If this bit is 1, it indicates that the automatic off-line data collection function is enabled.

Status Byte

Meaning

0

Off-line data collection is not started.

 

 

2

Off-line data collection has been completed normally.

4Off-line data collection has been suspended by a command interrupt.

5Off-line data collection has been aborted by a command interrupt.

6Off-line data collection has been aborted by a fatal error.

Self test execution status

Bits 0 to 3: Indicates the rest of self-test in 0 to 9 (corresponding 0 to 90%).

Bits 4 to 7: Indicates the self-test execution status at the following table.

C141-E120-02EN

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Fujitsu MHN2200AT, MHN2150AT, MHN2100AT, MHN2300AT manual Host Commands