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12.15 NCQ Non-Data (63h)
Table 111 NCQ Non-Data command (63h)
Command Input
Field
Description
FEATURE
Bit
Description
15:8
Reserved
7:4
Subcommand specific
3:0
SUBCOMMAND field
COUNT
Bit
Description
15:14
PRIO field
13:8
Reserved
7:3
NCQ TAG field
2:0
Reserved
LBA
Bit
Description
47:8
Reserved
7:3
Subcommand specific
2:0
Reserved
AUXILIARY
15:0 Subcommand specific
DEVICE
Bit Description
7 Reserved
6 Shall be set to one
5 Reserved
4 Shall be cleared to zero
3:0 Reserved
Command
7:0 63h
Table 37 defines the NCQ Non-Data subcommands. See the referenced sections for additional information in this
table.
The output from the host to the device, the command acceptance outputs for this command, the normal outputs for
this command and the error outputs for this command are subcommand specific. See Sections 12.15.1 and 12.15.2.
177
Hard Disk Drive Specification