Table 42 Key Sector Format; Table 43 Sct Action Code List - Hitachi HDS723020BLA642 Specifications

9.18.2.1.3 Key Sector Format
An SCT command (Key Sector) is always 512 bytes long. Table below shows the generic format of an SCT
command.
Byte Field
1:0 Action Code
3:2 Function Code
X:4 Parameter1
Y:x+1 Parameter2
... ...
Total Words

Table 42 Key Sector Format

The action codes are defined in Table below.
Action Code
0000h
0001h
0002h
0003h
0004h
0005h
0006h-BFFFh
C000h-FFFFh

Table 43 SCT Action Code List

Words
1
1
Depends on command
Depends on command
...
256
Block Data TF Data
- -
Read/Write Y
Write N
- Y
- Y
Read N
- -
- -
Hitachi hard disk drive specifications
Description
This field defines the command type and
generally specifies the type of data being
accessed, such as sector or physical action
being performed, such as seek.
This field specifies the type of access, and
varies by command. For example, this can
specify read, write, verify, etc.
Depends on command
Depends on command
...
Description
Reserved
Long Sector Access (Not Supported)
SCT Write Same
Error Recovery Control
Features Control
SCT Data Table
Reserved
Vendor Specific
87