WD Green MB500M-6Gb AT Command Set
2679-771422-A00 RELEASED 5/2/13 (WD CONFIDENTIAL) 25
4.2.2 Supported Attributes
The drive supports the following attributes.
Attributes that use the Pre-Failure/Advisory Bit Set can predict potential future degrading or faulty
conditions. Attributes with the Failure/Advisory Bit Clear are used for informational purposes only,
they do not indicate impending drive failure.
The S.M.A.R.T. data saving process is a background task. After a pre-determined idle period, the self-
monitoring data is automatically saved to the disk.
Attribute Attribute ID Number Pre-Failure/Advisory Bit
(Status Flags bit 0)
1
Read Error Rate 1 Pre-Failure
Spin-up Time 3 Pre-Failure
Start/Stop Count 4 Advisory
Re-allocated Sector Count 5 Pre-Failure
Seek Error Rate 7 Advisory
Power-on Hours Count 9 Advisory
Spin-up Retry Count 10 Advisory
Drive Calibration Retry Count 11 Advisory
Drive Power Cycle Count 12 Advisory
Emergency Retract Cycles 192 Advisory
Load/Unload Cycles 193 Advisory
HDA Temperature
2
194 Advisory
Relocation Event Count 196 Advisory
Current Pending Sector Count 197 Advisory
Offline Scan Uncorrectable Sector Count 198 Advisory
Ultra DMA CRC Error Rate 199 Advisory
Multi-zone Error Rate 200 Advisory
1
Status bits are typical but may vary.
2
See “Temperature Reporting” on page 15 for a better mechanism.
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