Fujitsu MPC3045AH Product Manual page 116

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.
Failure prediction capability flag
Bit 0: The attribute value data is saved to a medium before the device enters power saving
mode.
Bit 1: The device automatically saves the attribute value data to a medium after the previously
set operation.
Bits 2 to 15: Reserved bits
Check sum
Two's complement of the lower byte, obtained by adding 511-byte data one byte at a time
from the beginning.
Insurance failure threshold
The limit of a varying attribute value. The host compares the attribute values with the
thresholds to identify a failure.
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