Function Subcommands - Hitachi 7K80 - Deskstar - Hard Drive Specifications

12.42.1 S.M.A.R.T. Function Subcommands
Code
D0h S.M.A.R.T. Read Attribute Values
D1h S.M.A.R.T. Read Attribute Thresholds
D2h S.M.A.R.T. Enable/disable Attribute Autosave
D3h S.M.A.R.T. Save Attribute Values
D4h S.M.A.R.T. Execute Off-line Immediate
D5h S.M.A.R.T. Read Log Sector
D6h S.M.A.R.T. Write Log Sector
D8h S.M.A.R.T. Enable Operations
D9h S.M.A.R.T. Disable Operations
DAh S.M.A.R.T. Return Status
DBh S.M.A.R.T. Enable/Disable Automatic Off-line
12.42.1.1 S.M.A.R.T. Read Attribute Values (subcommand D0h)
This subcommand returns the Attribute Values of the device to the host. Upon receipt of the S.M.A.R.T. Read
Attribute Values subcommand from the host, the device saves any updated Attribute Values to the Attribute Data
sectors and then transfer the 512 bytes of Attribute Value information to the host.
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 155:
"S.M.A.R.T. Error Codes" on page 221.
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.
Subcommand
Deskstar 7K80 Hard Disk Drive Specification
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