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Each SMART attribute indicates a
certain characteristic of the drive and has its own value derived from a special
normalization algorithm and formula. The attributes listed below are specific
to WD drives. Other drive manufacturers may have their own attribute definition.
RAW Read Error Rate |
This attribute indicates the average rate of read error retries. |
Spin Up
Time |
This attribute indicates the average spin up time, which describes the amount of time it took to spin up the platters to their rated rotation speed. |
Start/Stop
Count |
This attribute indicates the number of drive start/stop cycles. |
Reallocated
Sector Count |
This attribute indicates the number of bad sectors relocated to a spare area. |
Seek Error
Rate |
This attribute indicates the average rate of seek errors. |
Power On
Hour Count |
This attribute indicates how long the drive
was working (powered on). |
Spin Retry
Count |
This attribute indicates the number of retries of drive spin up at power up. |
Calibration
Retry Count |
This attribute indicates the number of retries of drive calibration after spin up. |
Power Cycle
Count |
This attribute indicates the number of drive power cycles. |
Relocation
Event Count |
This attribute indicates the number of times recalibration was requested. |
Current
Pending Sector Count |
This attribute indicates the number of
sectors pending for relocation. Sectors with read or write errors are
recorded and await relocations to spare sectors when the next write commands are
issued. |
Off-line
Scan Uncorrectable Sector Count |
This attribute indicates the number of
firmware uncorrectable error sectors detected during the last off-line scan. |
UltraDMA
CRC Error Rate |
UDMA controller performs CRC error checking on data while transferring data between the host and the drive. Each time the error occurs, a retransmission is requested. This attribute indicates the average rate of CRC errors. |
Multi Zone
Error Rate |
This attribute indicates a rate at which write retries are requested. |
GMR Head Amp |
This attribute indicates the amplitude of GMR (Giant
Magnetoresistive) head. |
Temperature |
This attribute indicates the temperature for
drives equipped with a thermal sensor. |