Hitachi 7K250 Specifications - Page 200
S.M.A.R.T. Function Set B0h
UPC - 000004558972
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12.42 S.M.A.R.T. Function Set (B0h) Table 116: S.M.A.R.T. Function Set command (B0h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature V V V V V V V V Sector Count V V V V V V V V Sector Number Cylinder Low 0 1 0 0 1 1 1 1 Cylinder High 1 1 0 0 0 0 1 0 Device/Head 1 - 1 D - - - - Command 1 0 1 1 0 0 0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status see below 76 CRC UNC 0V Error Register 543210 0 IDN 0 ABT T0N AMN 0V0V0V Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 0V0V-0-V The S.M.A.R.T. Function Set command provides access to the Attribute Values, the Attribute Thresholds, and other low level subcommands that can be used for logging and reporting purposes and to accommodate special user needs. The S.M.A.R.T. Function Set command has several separate subcommands which can be selected via the Features Register of the device when the S.M.A.R.T. Function Set command is issued by the host. In order to select a subcommand the host must write the subcommand code to the Features Register of the device before issuing the S.M.A.R.T. Function Set command. The subcommands and their respective codes are listed below. 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. Deskstar 7K250 Hard Disk Drive Specification 186