Function Set (B0H); Function Subcommands - Hitachi HDS725050KLA360 Specifications
3.5 inch ultra ata/133 hard disk drive, 3.5 inch serial ata hard disk drive
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Also See for HDS725050KLA360:
- Install manual (2 pages) ,
- Specifications (191 pages) ,
- Datasheet (2 pages)
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12.42 S.M.A.R.T. Function Set (B0h)
Table 149: S.M.A.R.T. Function Set command (B0h)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
7
6
5
CRC UNC
0
0
V
0
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 can be selected via the
Features Register of the device 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 Features Register of the device
before issuing the S.M.A.R.T. Function Set command. The subcommands and their respective codes are listed
below.
12.42.1 S.M.A.R.T. Function Subcommands
Code
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
12.42.1.1 S.M.A.R.T. Read Attribute Values (subcommand D0h)
This subcommand returns the Attribute Values of the device to the host. Upon receipt of the S.M.A.R.T. Read
Attribute Values subcommand from the host, the device saves any updated Attribute Values to the Attribute Data
sectors and then transfer the 512 bytes of Attribute Value information to the host.
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
Error Register
4
3
2
1
IDN
0
ABT T0N AMN
V
0
V
0
Subcommand
Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0
7
6
5
BSY RDY DF DSC DRQ COR IDX ERR
V
0
V
0
199
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
4
3
2
1
V
-
0
-
0
V
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