Hitachi 7K320 Specifications - Page 143

S.M.A.R.T Function Set B0h

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7K320 (SATA) OEM Specification 14.40 S.M.A.R.T Function Set (B0h) Command Block Output Registers Register 76543210 Data -------- Feature VVVVVVVV Sector Count VVVVVVVV LBA Low -------- LBA Mid 01001111 LBA High 11000010 Device -------- Command 10110000 Command Block Input Registers Register 76543210 Data -------- Error ...See Below... Sector Count -------- LBA Low -------- LBA Mid -------- LBA High -------- Device -------- Status ...See Below... Error Register 7 6 5 4 3 2 1 0 CRC UNC 0 IDN 0 ABT T0N AM N 000 0 0V0 0 Table 111 S.M.A.R.T. Function Set Command (B0h) Status Register 7 6 5 4 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0V0V - 0 0V The S.M.A.R.T. Function Set command provides access to Attribute Values, 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. 14.40.1 S.M.A.R.T. Sub commands 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. Code D0h D1h D2h D3h D4h D5h D6h D8h D9h DAh DBh .4 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 S.M.A.R.T. Enable Operations S.M.A.R.T. Disable Operations S.M.A.R.T. Return Status S.M.A.R.T. Enable/Disable Automatic Off-Line S.M.A.R.T. Read Attribute Values (Subcommand D0h) This subcommand returns the device's Attribute Values 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 waits for the host to transfer the 512 bytes of Attribute Value information from the device. Page 143 of 176

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7K320 (SATA) OEM Specification
Page 143 of 176
14.40
S.M.A.R.T Function Set (B0h)
Command Block Output Registers
Command Block Input Registers
Register
7 6 5 4 3
2
1
0
Register
7 6 5 4 3 2
1
0
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
-
-
-
-
-
-
-
-
Device
-
-
-
-
-
-
-
-
Command
1 0 1 1 0
0
0
0
Status
...See Below...
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC
0
IDN
0
ABT
T0N
AM
N
BSY
RDY
DF
DSC
DRQ COR
IDX
ERR
0
0
0
0
0
V
0
0
0
V
0
V
-
0
0
V
Table 111 S.M.A.R.T. Function Set Command (B0h)
The S.M.A.R.T. Function Set command provides access to Attribute Values, 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.
14.40.1
S.M.A.R.T. Sub commands
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.
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
.4
S.M.A.R.T. Read Attribute Values (Subcommand D0h)
This subcommand returns the device’s Attribute Values 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 waits for the host to transfer the 512 bytes of Attribute Value
information from the device.