Datasheet

1.9 FC-4 Device Data
C141-C008 1-83
(1) Task Attribute [PL:W02/B1/bit2-0]
The initiator specifies the Command Queue type.
0h: Simple Queue
1h: Head of Queue
2h: Ordered Queue
4h: ACA Queue
5h: Untagged
− The drive handles ACA Queue as same as Simple Queue.
(2) Task Management flag [PL:W02/B2]
The initiator uses to control the task.
a) Obsolete [B2/bit7]
0b: This drive does not support the bit. If this bit set, the drive respond
FCP_RSP with "Task Management Function Not Support" of
FCP_CODE.
b) Clear ACA [B2/bit6]
0b: This drive does not support the bit, works as 0.
c) Target Reset [B2/bit5]
− This drive clears all commands queued when this drive receives the
Target Reset.
− The drive generates the UNIT ATTENTION condition internally for
all of initiators. If the drive receives the command after Target
Reset, the drive will respond check condition (SenseKey=UNIT
ATTENTION).
− The drive aborts all of "Open Exchange".
d) Logical Unit Reset [B2/bit4]
− This drive clears all commands queued when this drive receives the
Target Reset.
− The drive generates the UNIT ATTENTION condition internally for
all of initiators. If the drive receives the command after Target
Reset, the drive will respond check condition (SenseKey=UNIT
ATTENTION).
− The drive aborts all of "Open Exchange".