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12.15.2 Deadline handling Subcommand (1h)
Table 114 Deadline handling Subcommand (1h)
Command Input
Field
Description
FEATURE
Bit
Description
15:6
Reserved
5
RDNC bit
4
WDNC bit
3:0
Subcommand (1h)
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
TTAG field
2:0
Reserved
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
Normal Outputs
If this Deadline Handling Subcommand command is supported, the device returns the command completed with no
error.
When a Deadline Handling Subcommand command completes successfully, a Set Device Bits FIS is sent to the host
to complete the Deadline Handling subcommand. This SDB FIS may also indicate other completed commands.
Error Outputs
The device returns command aborted if:
a) NCQ is disabled and a DEADLINE HANDLING command is issued to the device;
b) The value of the TTAG field equals the value of the TAG field;
c) The value of the TTAG field is an invalid TAG number; or
d) An unsupported Abort type parameter is specified.
180
Hard Disk Drive Specification