Interface
5-58 C141-E057-01EN
Features Resister
Function
X’DA’
SMART Return Status:
When the device receives this subcommand, it asserts the BSY bit
and saves the current device attribute values. Then the device
compares the device attribute values with insurance failure threshold
values. If there is an attribute value exceeding the threshold, F4h
and 2Ch are loaded into the CL and CH registers. If there are no
attribute values exceeding the thresholds, 4Fh and C2h are loaded
into the CL and CH registers. After the settings for the CL and CH
registers have been determined, the device clears the BSY bit
The host must regularly issue the SMART Read Attribute Values subcommand
(FR register = D0h), SMART Save Attribute Values subcommand (FR register =
D3h), or SMART Return Status subcommand (FR register = DAh) to save the
device attribute value data on a medium.
Alternative, the device must issue the SMART Enable-Disable Attribute
AutoSave subcommand (FR register = D2h) to use a feature which regularly save
the device attribute value data to a medium.
The host can predict failures in the device by periodically issuing the SMART
Return Status subcommand (FR register = DAh) to reference the CL and CH
registers.
If an attribute value is below the insurance failure threshold value, the device is
about to fail or the device is nearing the end of its life . In this case, the host
recommends that the user quickly backs up the data.
At command issuance (I-O registers setting contents)
1F7H
(CM)
10110000
1F6H
(DH)
×××DV
xx
1F5H
(CH)
1F4H
(CL)
1F3H
(SN)
1F2H
(SC)
1F1H
(FR)
Key (C2h)
Key (4Fh)
xx
xx
Subcommand