Deskstar 7K160 Hard Disk Drive Specification
111
The action codes are defined in Table below.
Byte Field Words Description
1:0 Action Code 1 This field defines the command type and
generally specifies the type of data being
accessed, such as sector, long sector, etc.
or physical action being performed, such
as seek.
3:2 Function Code 1 This field specifies the type of access, and
varies by command. For example, this can
specify read, write, verify, etc.
X:4 Parameter1 Depends on
command
Depends on command
Y:x+1 Parameter2 Depends on
command
Depends on command
… … … …
Total Words 256
Action Code Block Data TF Data Description
0000h - - Reserved
0001h Read/Write Y Long Sector Access
0002h Write N LBA Segment Access
0003h - Y Error Recovery Control
0004h - Y Features Control
0005h Read N SCT Data Table
0006h-BFFFh - - Reserved
C000h-FFFFh - - Vendor Specific
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