Hitachi 7K250 Specifications - Page 201
S.M.A.R.T. Enable/Disable Attribute Autosave subcommand D2h
UPC - 000004558972
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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/Disable 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 127: "S.M.A.R.T. Error Codes" on page 198. The S.M.A.R.T. Disable Operations subcommand disables the Autosave feature along with the S.M.A.R.T. operations of the device. Upon the receipt of the subcommand from the host, the device asserts BSY, enables or disables the Autosave feature, 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 offline mode (off-line routine) or execute a self-test routine in either captive or off-line mode. The Sector Number register shall be set to specify the operation to be executed. Sector Number 0 1 2 127 129 130 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 Abort off-line mode self-test routine Execute S.M.A.R.T. Short self-test routine immediately in captive mode Execute S.M.A.R.T. Extended self-test routine immediately in captive mode Off-line mode: The device executes command completion before executing the specified routine. During execution of the routine the device will not set BSY nor clear DRDY. If the device is in the process of performing its routine and is interrupted by a new command from the host, the device will abort or suspend its routine and service the Deskstar 7K250 Hard Disk Drive Specification 187