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13.32 S.M.A.R.T. Function Set (B0h)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7
6
5
CRC
UNC
0
0
0
0
Figure 121. S.M.A.R.T. Function Set command (B0h)
The
Function Set command provides access to the Attribute Values, the Attribute Thresholds,
S.M.A.R.T.
and other low level subcommands that can be used for logging and reporting purposes and to accommo-
date special user needs. The
which are selectable via the device's Features Register when the
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
codes are listed below.
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
7 6 5 4 3 2 1 0
- - - - - - - -
V V V V V V V V
V V V V V V V V
- - - - - - - -
0 1 0 0 1 1 1 1
1 1 0 0 0 0 1 0
1 - 1 D - - - -
1 0 1 1 0 0 0 0
4
3
2
1
0
IDN
0
ABT
T0N
AMN
0
0
V
0
0
Function Set command has several separate subcommands
S.M.A.R.T.
Function Set command. The subcommands and their respective
S.M.A.R.T.
Travelstar 60GH & 40GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
7
6
5
4
BSY
RDY
DF
DSC
0
V
0
V
S.M.A.R.T.
165
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
3
2
1
0
DRQ
COR
IDX
ERR
-
0
-
V
Function Set command is
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