Hitachi HDS725050KLA360 Specifications page 214

12.42.1.2 S.M.A.R.T. Read Attribute Thresholds (subcommand D1h)
This subcommand returns the Attribute Thresholds of the device to the host. Upon receipt of the SMART Read
Attribute Thresholds subcommand from the host, the device reads the Attribute Thresholds from the Attribute
Threshold sectors and then transfers the 512 bytes of Attribute Thresholds information to the host.
12.42.1.3 S.M.A.R.T. Enable/Disable Attribute Autosave (subcommand D2h)
This subcommand enables and disables the Attribute Autosave feature of the device. The S.M.A.R.T. Enable/Dis-
able Attribute Autosave subcommand allows the device to automatically save its updated Attribute Values to the
Attribute Data Sector periodically or 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 the power cycle.
A value of 00h written by the host into the Sector Count Register of the device 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 another normal operation
such as a power-up or a 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 nonzero 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. However the device will respond with the error code specified in Table 161:
"S.M.A.R.T. Error Codes" on page 212.
The S.M.A.R.T. Disable Operations subcommand disables the Autosave feature along with the S.M.A.R.T. opera-
tions of the device.
Upon the receipt of the subcommand from the host, the device asserts BSY, enables or disables the Autosave fea-
ture, clears BSY, and asserts INTRQ.
12.42.1.4 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 asserts BSY, writes any updated Attribute Values to the Attribute
Data sector, clears BSY, and asserts INTRQ.
12.42.1.5 S.M.A.R.T. Execute Off-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 Sector Number reg-
ister shall be set to specify the operation to be executed.
Sector
Number
0 Execute S.M.A.R.T. off-line data collection routine immediately
1 Execute S.M.A.R.T. Short self-test routine immediately in off-line mode
2 Execute S.M.A.R.T. Extended self-test routine immediately in off-line mode
4 Execute SMART Extended self-test routine immediately in off-line mode
127 Abort off-line mode self-test routine
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
132 Execute SMART Selective self-test routine immediately in captive mode
Operation to be executed
Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
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