Datasheet

Travelstar 80GN Hard Disk Drive Specification

161

13.38 S.M.A.R.T. Function Set (B0h)

Table 112: S.M.A.R.T. Function Set (B0h)

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 are selectable via the

device's Features Register 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 device's Features Register before issuing the

S.M.A.R.T. Function Set command. The subcommands and their respective codes are listed below.

Command Block Output Registers Command Block Input Registers

Data - - - - - - - - Data - - - - - - - -

Feature V V V V V V V V Error see below

Sector Count V V V V V V V V Sector Count - - - - - - - -

LBA Low - - - - - - - - LBA Low - - - - - - - -

LBA Mid 0 1 0 0 1 1 1 1 LBA Mid - - - - - - - -

LBA High 1 1 0 0 0 0 1 0 LBA High - - - - - - - -

Device 1 - 1 D - - - - Device - - - - - - - -

Command 1 0 1 1 0 0 0 0 Status see below

Error Register Status Register

76543210 76543210

CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR

00000V00 0V0V-0-V

Code Subcommand

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