Function Set (B0H); Table 109 S.m.a.r.t. Function Set Command (B0H) - Hitachi HTS542516K9SA00 Specifications

14.39 S.M.A.R.T Function Set (B0h)
Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
Error Register
7 6 5 4
CRC UNC 0 IDN
0 0 0 0

Table 109 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.
S.M.A.R.T. Sub commands
14.39.1
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.
Subcommand
Code
S.M.A.R.T. Read Attribute Values
D0h
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
14.39.1.1 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.
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 0 1 1 0 0 0 0
3 2 1 0
0 ABT T0N AM
N
0 V 0 0
Page 139 of 171
5K250 (SATA) OEM Specification
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
Status Register
7 6 5 4
BSY RDY DF DSC DRQ COR IDX ERR
0 V 0 V
7 6 5 4 3 2 1 0
- - - - - - - -
...See Below...
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
...See Below...
3 2 1 0
- 0 0 V