Function Set (B0H); Figure 116. S.m.a.r.t. Function Set Command (B0H) - IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive Specifications

2.5 inch ata/ide hard disk drive
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13.33 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 116. 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
accommodate special user needs. The
subcommands which are selectable via the device's Features Register when the
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
codes are listed below.
Code
D0h
D1h
D2h
D3h
D4h
D5h
D6h
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
IDN
0
ABT
T0N
AMN
0
0
V
0
S.M.A.R.T.
Function Set command. The subcommands and their respective
S.M.A.R.T.
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
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0
7
6
5
BSY
RDY
DF
0
0
V
0
Function Set command has several separate
169
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
4
3
2
1
0
DSC
DRQ
COR
IDX
ERR
V
-
0
-
V
Function Set
S.M.A.R.T.

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