Hitachi HTS725050A9A364 Datasheet download pdf (Page 144)

7K500 OEM Specification

Page 144 of 176

.5 S.M.A.R.T. Read Attribute Thresholds (Subcommand D1h)

S.M.A.R.T. Read Attribute Thresholds (Subcommand D1h) S.M.A.R.T. Read Attribute Thresholds (Subcommand D1h)

S.M.A.R.T. Read Attribute Thresholds (Subcommand D1h)

This subcommand returns the device’s Attribute Thresholds to the host. Upon receipt of the

S.M.A.R.T. Read Attribute Thresholds subcommand from the host, the device reads the Attribute

Thresholds from the Attribute Threshold sectors and then waits for the host to transfer the 512

bytes of Attribute Thresholds information from the device.

.6 S.M.A.R.T. Enable/Disable Attribute Autosave (Subcommand

S.M.A.R.T. Enable/Disable Attribute Autosave (Subcommand S.M.A.R.T. Enable/Disable Attribute Autosave (Subcommand

S.M.A.R.T. Enable/Disable Attribute Autosave (Subcommand

D2h)

D2h) D2h)

D2h)

This subcommand enables and disables the attribute autosave feature of the device. The S.M.A.R.T.

Enable/Disable Attribute Autosave subcommand allows the device to automatically save its updated

Attribute Values to the Attribute Data Sector at the timing of the first transition to Active idle mode

after 30 minutes since the last saving of Attribute Values; this subcommand causes the autosave

feature to be disabled. The state of the Attribute Autosave feature (either enabled or disabled) will

be preserved by the device across power cycle.

A value of 00h written by the host into the device’s Sector Count Register before issuing the

S.M.A.R.T. Enable/Disable Attribute Autosave subcommand will cause this feature to be disabled.

Disabling this feature does not preclude the device from saving Attribute Values to the Attribute

Data sectors during some other normal operation such as during a power-up or power-down.

A value of F1h written by the host into the device’s Sector Count Register before issuing the

S.M.A.R.T. Enable/Disable Attribute Autosave subcommand will cause this feature to be enabled.

Any other non-zero value written by the host into this register before issuing the S.M.A.R.T.

Enable/Disable Attribute Autosave subcommand will not change the current Autosave status but the

device will respond with the error code specified in “Table 124 S.M.A.R.T. Error Codes” on Page 158.

The S.M.A.R.T. Disable Operations subcommand disables the autosave feature along with the

device’s S.M.A.R.T. operations.

Upon the receipt of the subcommand from the host the device enables or disables the Autosave

feature.

.7 S.M.A.R.T. Save Attribute Values (Subcommand D3h)

S.M.A.R.T. Save Attribute Values (Subcommand D3h) S.M.A.R.T. Save Attribute Values (Subcommand D3h)

S.M.A.R.T. Save Attribute Values (Subcommand D3h)

This subcommand causes the device to immediately save any updated Attribute Values to the

device’s Attribute Data sector regardless of the state of the Attribute Autosave feature. Upon receipt

of the S.M.A.R.T. Save Attribute Values subcommand from the host, the device writes any updated

Attribute Values to the Attribute Data sector.

.8 S.M.A.R.T. Execute Off

S.M.A.R.T. Execute OffS.M.A.R.T. Execute Off

S.M.A.R.T. Execute Off-

-line Immediate (Subcommand D4h)

line Immediate (Subcommand D4h) line Immediate (Subcommand D4h)

line Immediate (Subcommand D4h)

This subcommand causes the device to immediately initiate the set of activities that collect Attribute

data in an off-line mode (off-line routine) or execute a self-test routine in either captive or off-line

mode.

The LBA Low register shall be set to specify the operation to be executed.

LBA Low Operation to be executed

Execute S.M.A.R.T. off-line data collection routine immediately

Execute S.M.A.R.T. Short self-test routine immediately in off-line mode

Execute S.M.A.R.T. Extended self-test routine immediately in off-line mode

Reserved

Execute SMART Selective self-test routine immediately in off-line mode

127

Abort off-line mode self-test routine

128

Reserved

129

Execute S.M.A.R.T. Short self-test routine immediately in captive mode

130

Execute S.M.A.R.T. Extended self-test routine immediately in captive mode

131

Reserved

132

Execute SMART selective self-test routine immediately in captive mode

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Hitachi HTS725050A9A364 Datasheet Page 144

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