Subject: Re: NetBSD master CVS tree commits
To: Justin T. Gibbs <>
From: Jason Thorpe <>
List: tech-kern
Date: 09/03/1996 12:44:56
On Tue, 03 Sep 1996 11:44:07 -0700 
 "Justin T. Gibbs" <> wrote:

 > You mean its set until we know that its a SCSI-2 device not that,
 > "Its set (always) for the SCSI-2 devices 'just in case'", right?

After discussing it with Charles, and checking the spec again, we didn't 
see any reason _not_ to allow it to be set on SCSI-2 devices.  The spec 
clearly states that it's allowed (albeit discouraged).  Also, in every 
SCSI-2 draft I've ever seen, the LUN is clearly marked in the CDB, 
further indicating to me SCSI-2 devices don't mind if it's there.

The only mention of those bits being reserved is in the section that says 
those bits may be reclaimed by SCSI-3.

If there's a compelling reason to _not_ set those bits in the case of a 
SCSI-2 device, I'll change it.  However, everthing thing I've seen 
indicates that it's completely benign.

 -- save the ancient forests - -- 
Jason R. Thorpe                             
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