Datasheet
Z5K500 OEM Specifications
141
14.41 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 AMN 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.
14.41.1 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
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
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.
S.M.A.R.T. Read Attribute Thresholds (Subcommand D1h)
This subcommand returns the device’s Attribute Thresholds to the host. Upon receipt of the S.M.A.R.T.
Read Attribute Thresholds subcommand from the host, the device reads the Attribute Thresholds from
the Attribute Threshold sectors and then waits for the host to transfer the 512 bytes of Attribute
Thresholds information from the device.