CLEAR TASK SET task management function

Douglas Gilbert dougg at
Wed Feb 28 07:53:55 PST 2007

* From the T10 Reflector (t10 at, posted by:
* Douglas Gilbert <dougg at>
Rob Elliott wrote:
> Does any SCSI software other than test software actually use the CLEAR TASK
> SET task management function? CLEAR TASK SET clears tasks from all I_T
> nexuses.
> If so, would that software be happy to use one of these instead?
> a) ABORT TASK SET - just clear tasks from the same I_T nexus; or
> b) LOGICAL UNIT RESET - clear tasks from all I_T nexuses and wipe out other
> state information
Poking around in Linux, I can see various low level
(i.e. hardware specific) drivers that have hooks for
a CLEAR TASK SET tmf call.
However there doesn't seem to be any use of that tmf
by higher level kernel drivers. That leaves low level
pass-throughs. I can see the lsiutil program for MPT
Fusion hardware allows that tmf to be issued.
Doug Gilbert
* For T10 Reflector information, send a message with
* 'info t10' (no quotes) in the message body to majordomo at

More information about the T10 mailing list