User manual
Hitachi hard disk drive specifications
204
11.42 SMART 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
-
-
-
-
-
-
-
-
Sector Number
V
V
V
V
V
V
V
V
Sector Number
-
-
-
-
-
-
-
-
Cylinder Low
0
1
0
0
1
1
1
1
Cylinder Low
-
-
-
-
-
-
-
-
Cylinder High
1
1
0
0
0
0
1
0
Cylinder High
-
-
-
-
-
-
-
-
Device/Head
1
-
1
D
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
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
V
0
V
0
V
0
0
0
V
0
V
-
0
-
V
Table 149 SMART Function Set Command (B0h)
The SMART 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 SMART Function Set command has several separate subcommands which are selectable via the
device‟s Features Register when the SMART Function Set command is issued by the host.