Fujitsu MHJ2181AT, MHK2120AT, MHK2090AT manual Features Register values subcommands and functions 1

Interface

Table 5.7 Features Register values (subcommands) and functions (1 of 3)

Features Resister			Function
X’D0’	SMART Read Attribute Values:
	A device that received this subcommand asserts the BSY bit and saves all
	the updated attribute values. The device then clears the BSY bit and
	transfers 512-byte attribute value information to the host.
	* For infomation about the format of the attribute value information, see
		Table 5.8.
X’D1’	SMART Read Attribute Thresholds:
	This subcommand is used to transfer 512-byte insurance failure threshold
	value data to the host.
	* For infomation about the format of the insurance failure threshold value
		data, see Table 5.9.
X’D2’	SMART Enable-Disable Attribute AutoSave:
	This subcommand is used to enable (SC register ≠ 00h) or disable (SC
	register = 00h) the setting of the automatic saving feature for the device
	attribute data. The setting is maintained every time the device is turned off
	and then on. When the automatic saving feature is enabled, the attribute
	values are saved before the device enters the power saving mode. However,
	if the failure prediction feature is disabled, the attribute values are not
	automatically saved.
	When the device receives this subcommand, it asserts the BSY bit, enables
	or disables the automatic saving feature, then clears the BSY bit.
X’D3’	SMART Save Attribute Values:
	When the device receives this subcommand, it asserts the BSY bit, saves
	device attribute value data, then clears the BSY bit.
X’D4’	SMART Executive Off-line Immediate:
	A device which receives this command asserts the BSY bit, then starts
	collecting the off-line data specified in the SN register, or stops.
	In the off-line mode, after BSY is cleared, off-line data are collected. In the
	captive mode, it collects off-line data with the BSY assertion as is, then
	clears the BSY when collection of data is completed.
		SN	Off-line data collection mode
		00h: Off-line diagnosis (off-line mode)
		01h: Simple self test (off-line mode)
		02h:	Comprehensive self test (off-line mode)
		7Fh:	Self test stop
		81h: Simple self test (captive mode)
		82h: Comprehensive self test (captive mode)

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