Hitachi HDS728080PLAT20 Specifications - Page 213
S.M.A.R.T. Function Subcommands
UPC - 829686000094
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12.42.1 S.M.A.R.T. Function Subcommands Code D0h D1h D2h D3h D4h D5h D6h D8h D9h DAh DBh Subcommand S.M.A.R.T. Read Attribute Values S.M.A.R.T. Read Attribute Thresholds S.M.A.R.T. Enable/disable Attribute Autosave S.M.A.R.T. Save Attribute Values S.M.A.R.T. Execute Off-line Immediate S.M.A.R.T. Read Log Sector S.M.A.R.T. Write Log Sector S.M.A.R.T. Enable Operations S.M.A.R.T. Disable Operations S.M.A.R.T. Return Status 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/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 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. 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. Deskstar 7K80 Hard Disk Drive Specification 209