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 information 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 information 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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Fujitsu MHM2100AT, MHM200AT, MHM215OAT, MHL2300AT manual Features Register values subcommands and functions 1
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