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Chapter 2 Task Management
Task Management Function
DLT-S4 Interface Reference Guide
8
CLEAR TASK SET
2
CLEAR TASK SET
clears all commands for requesting initiator.
CLEAR
TASK SET
can clear multiple commands, when command queuing is in
effect.
ABORT TASK
2
This task management function causes the drive to clear the current I/O
process on the selected unit. Buffered (cached) write operations are
completed if possible. The current settings of
MODE SELECT
parameters
and reservations are not affected. Commands, data, and status for other
initiators are not affected.
This task management function can be sent to a logical unit that is not
currently performing an operation for the initiator.
If a
WRITE
command is in progress and
STATUS
has not been sent to the
initiator when the drive receives this task management function, some or
all of the data for this command may be written to the medium.
ABORT TASK SET
2
ABORT TASK SET
aborts all commands for the requesting initiator.
ABORT TASK SET
can clear multiple commands, when command queuing
is in effect.
QUERY TASK
2
Supported in the SAS protocol only. It is used as part of the protocol error
recovery process to determine if a command was received by the drive or
was discarded due to an error detected at the protocol layer.