Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!hplabs!hpda!hpcupt1!hprnd!kc
From: kc@hprnd.rose.hp.com (Kurt Chan)
Newsgroups: comp.periphs.scsi
Subject: Re: Command Queueing in SCSI-2
Message-ID: <13110011@hprnd.rose.hp.com>
Date: 14 Nov 90 01:03:42 GMT
References: <4297@alliant.Alliant.COM>
Organization: HP Roseville Networks Division
Lines: 16

In addition, the consensus of the last ANSI working group in Austin was
that it was our intent to allow multiple *active* I/O processes to occur in
a target, as long as the target had multiple independent sense areas to
maintain REQUEST SENSE information for each process.

What this means is that you are permitted by the standard to make forward
progress on queued process 2 even though queued process 1 was received
first and may be mid-way through completion (of course, data integrity
remains a vendor-specific problem).

We are working on wording which may appear in a Technical Information
Bulletin to clarify this intent.

Kurt Chan
Hewlett-Packard
Roseville Networks Division