Does TST == 001b break initiator software?

Charles A Monia charles_a_monia at
Mon Apr 6 09:34:26 PDT 1998

* From the T10 (formerly SCSI) Reflector (t10 at, posted by:
* "Charles A Monia" <charles_a_monia at>
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PJohansson wrote:

> * From the T10 (formerly SCSI) Reflector (t10 at, posted by:
> * PJohansson <PJohansson at>
> *
> In a message dated 98-04-04 09:48:41 EST, ROWEBER at writes:
> <<As for implementations using TST=001b, they are new implementations, at
> least with respect to what is specified in the standards.  Since they are new
> implementations, they should have no problem coping with the fact that ABORT
> TASK SET is the same as CLEAR TASK SET.  Just as the standard makes it pretty
> clear that a READ command will transfer data to the host, the standard can
> (should) made it clear that ABORT TASK SET is the same as CLEAR TASK SET, when
> TST=001b.  It's all a part of incorporating 97-225 in the draft standards.>>
> This is the point that is the heart of my argument:
> * If ABORT TASK SET equals CLEAR TASK SET when TST=001b, why should we have
> both?

As I commented in an earlier private note sent to Peter:

"Is there a way to perform the equivalent of  CLEAR TASK SET when TST=001b?  If
not,  it seems to me that the correct change is to extend the function so it
clears all tasks in all task sets belonging to the logical unit.  That change is
guaranteed to work without affecting compatibility."


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