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C141-E090-01EN 5 - 53
• Attribute ID
The attribute ID is defined as follows:
Attribute ID Attribute name
0 (Indicates unused attribute data.)
1 Read error rate
2 Throughput performance
3 Spin up time
4 Number of times the spindle motor is activated
5 Number of alternative sectors
7 Seek error rate
8 Seek time performance
9 Power-on time
10 Number of retries made to activate the spindle motor
12 Number of power-on-power-off times
13 to 198 (Reserved)
199 Ultra ATA CRC Error Rate
200 Write error rate
201 to 255 (Unique to vendor)
• Status flag
Bit 0: If this bit is 1, the attribute is within the insurance range of the device when the
attribute exceeds the threshold.
If this bit is 0, the attribute is outside the insurance range of the device when the attribute
exceeds the threshold.
Bits 1 to 15: Reserved bits
• 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.