Interface
(16) SMART (X’B0’)
This command predicts the occurrence of device failures depending on the subcommand specified in the Features field. If the Features field contains values that are not supported with the command, the Aborted Command error is issued.
Before issuing the command, the host must set the key values in the Cylinder Low and Cylinder High field (4Fh in the Cylinder Low field and C2h in the Cylinder High field). If the key values are incorrect, the Aborted Command error is issued.
If the failure prediction function is disabled, the device returns the Aborted Command error to subcommands other than those of the SMART Enable Operations (with the Features field set to D8h).
If the failure prediction function is enabled, the device collects and updates data on specific items. The values of items whose data is collected and updated by the device in order to predict device failures are hereinafter referred to as attribute values.
