User manual

Hitachi hard disk drive specifications
207
11.42.1.6 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.
Log sector address
Content
Type
00h
Log directory
Read Only
01h
Summary SMART Error Log
Read Only
03h
Extended Comprehensive SMART Error Log
See Note
06h
SMART Self-test Log
Read Only
07h
Extended Self-test Log
See Note
09h
Selective self-test Log
Read/Write
80h-9Fh
Host vendor specific
Read/Write
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
11.42.1.7 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
11.42.1.8 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.