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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 
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.