Hitachi hard disk drive specifications
216
11.43.1.6 SMART Read Log Sector (Subcommand D5h)
This command returns the specified log sector contents to the host.
The 512 bytes data are returned at a command and the Sector Count value shall be set to one. The Sector
Number shall be set to specify the log sector address.
Extended Comprehensive SMART Error Log
Note: Log addresses 03h and 07h are used by the Read Log Ext and Write Log Ext commands. If these log
addresses are used with the SMART Read Log Sector command, the device shall return command aborted.
Table 150 Log sector addresses
11.43.1.7 SMART Write Log Sector (Subcommand D6h)
This command writes 512 bytes data to the specified log sector.
The 512 bytes data are transferred at a command and the Sector Count value shall be set to one. The Sector
Number shall be set to specify the log sector address (0). If Read Only log sector is specified, the device returns
ABRT error
11.43.1.8 SMART Enable Operations (Subcommand D8h)
This subcommand enables access to all SMART capabilities within the device. Prior to receipt of a SMART
Enable Operations subcommand, Attribute Values are neither monitored nor saved by the device. The state of
SMART (either enabled or disabled) will be preserved by the device across power cycles. Once enabled, the
receipt of subsequent SMART Enable Operations subcommands will not affect any of the Attribute Values.
Upon receipt of the SMART Enable Operations subcommand from the host, the device enables SMART
capabilities and functions, and then saves any updated Attribute Values to the Attribute Data sector.
11.43.1.9 SMART Disable Operations (Subcommand D9h)
This subcommand disables all SMART capabilities within the device including the device‟s attribute autosave
feature. After receipt of this subcommand the device disables all SMART operations. Non self-preserved
Attribute Values will no longer be monitored. The state of SMART (either enabled or disabled) is preserved by
the device across power cycles.
Upon receipt of the SMART Disable Operations subcommand from the host, the device disables SMART
capabilities and functions, and then saves any updated Attribute Values to the Attribute Data sector.
After receipt of the device of the SMART Disable Operations subcommand from the host, all other SMART
subcommands – with the exception of SMART Enable Operations – are disabled, and invalid and will be aborted
by the device (including the SMART Disable Operations subcommand), returning the error code as specified in
0 on the page 230.
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