Subject: Re: Problems configuring SCSI disks
To: Jonathan Stone <>
From: Simon Burge <>
List: port-pmax
Date: 02/12/1998 12:05:48
On Wed, 11 Feb 1998 16:11:27 -0800  Jonathan Stone wrote:

> [supporting six or seven disk drives on one pmax scsi adaptor]
> >You need to play with the magic in sys/arch/pmax/pmax/conf-glue.c and
> >sys/arch/pmax/conf/scsi.pmax due to the funny SCSI configuration method
> >athat the PMAX uses.  I've got a machine with 7 disks on the internal bus
> >without any problems.  I'll send a patch when I get to work.
> >
> >Jonathan - I've been running with this for a couple of weeks now, should
> >I check it in and submit a pullup request?
> Fine with me, as long as it doesnt break tape drives.  I think 1.3
> also has glue entries for a second TC SCSI card; if so, maybe we
> should change both SCSI buses?

I'll check the tape drive out first.

> In retrospect the correct thing would be to do a `proper' new
> autoconfig match and attach routines -- preferably for 1.3 :).  The
> hp300 port does that with old 4.4bsd scsi code similar to the pmax
> scsi and rz.c drivers; we could probably copy that.  But it's always
> seemed as if the MI scsi code is `just around the corner' and so a
> proper autoconfig fix for the old code never quite seemed important
> enough.

What's really involved in moving to MI SCSI?  At a _very_ quick glance,
it looks like the Alpha uses the MI stuff and also support PMAZ cards,
so there's going to be a lot of stuff to work from.  You're right - it's
been talked about for a while now :)