[ On Friday, September 6, 2002 at 00:33:20 (-0700), Matthew Jacob wrote: ]
> Subject: Re: 1.6 on IPC (tagged queuing bug still there)
>
> 
> thirded, despite GAW's objections

You are not listening to the content of my objections, nor apparently
the suggestions I would consider acceptable

This issue affects all drives of the claimed vintage on _all_ machines
with _all_ kinds of scsipi-enabled drivers.

Sun systems are in fact the _least_likely_ systems to have drives which
are susceptible to tagged queuing bugs.  Sun explicitly QA'ed drives
because Solaris-2 was shipped with tagged queuing enabled and they
explicitly document what users who've chosen buggy third party drives
must do.  Sun users are very aware of these issues.

If this change is to be made I instist that it be made across the board
for all scsipi-enabled drivers.  See if that flies before you go hacking
at a very important performance feature in on a platform where it's
least likely to have adverse affects.

IMNSHO it would be far more intelligent to simply gather up published
lists of drive models which are known to have buggy tagged queuing
support (eg.  from the other *BSD quirk lists, etc.) and to make a
combined master list that can be used in the default scsiconf.c.
That'll cover the vast majority of problem drives that might still be in
service, and a simple warning note in the INSTALL documents will cover
the rest.

-- 
								Greg A. Woods

+1 416 218-0098;            <g.a.woods@ieee.org>;           <woods@robohack.ca>
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