Fujitsu MPD3XXXAT manual

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 it 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)	1	0	1	1	0	0	0	0
1F6H(DH)	×	×	×	DV			xx
1F5H(CH)				Key (C2h)
1F4H(CL)				Key (4Fh)
1F3H(SN)					xx
1F2H(SC)					xx
1F1H(FR)				Subcommand

At command completion (I-O registers setting contents)

1F7H(ST)				Status information
1F6H(DH)	×	×	×		DV	xx
1F5H(CH)		Key-failure prediction status (C2h-2Ch)
1F4H(CL)		Key-failure prediction status (4Fh-F4h)
1F3H(SN)					xx
1F2H(SC)					xx
1F1H(ER)				Error information

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