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From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com>
Message-Id: <199603200731.XAA22233@GndRsh.aac.dev.com>
Subject: Re: aic7xxx driver problem with wide and narrow busses attached.
To: gibbs@freefall.freebsd.org (Justin T. Gibbs)
Date: Tue, 19 Mar 1996 23:31:17 -0800 (PST)
Cc: mrl@teleport.com, current@Freebsd.Org
In-Reply-To: <199603200707.XAA08756@freefall.freebsd.org> from "Justin T. Gibbs" at Mar 19, 96 11:07:01 pm
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> 
> >> 
> >> 
> >> Disable parity detection in SCSI-Select.  I'm still trying to 
> >> track down why this happens on machines that have both a 
> >> Wide and narrow bus attached.  (Hey Rod... care to lend me
> >> a wide disk again? 8-)
> >> 
> >I'll have to do some house cleaning... my spare wide drive is a bit
> >full of data right now:
> >/dev/sd1a     2088244  1936934   -15750   101%    /B
> >
> >> I'll turn parity error checking off again in the driver for now.
> >
> >I'll slap a narrow disk on my 2940W and see if I can duplicate it
> >here, if it does duplicate I'll see about getting this data rolled
> >out to other disks and get it down to you for a debug session...
> 
> It may only occur on the 7880 based controllers.  Do you have any
> older 2940Ws around?

The only 2940W I have is:
ahc0 <Adaptec 2940 SCSI host adapter> rev 3 int a irq 11 on pci0:12
ahc0: aic7870 Wide Channel, SCSI Id=7, 16 SCBs

I don't currently have any 2940UW's.

> >Should I be able to duplicate this in -stable, or does this problem
> >only seem to be occuring with -current?
> 
> I only enabled parity checking for the aic78X0 family recently in
> -current.  I didn't even think much about it since it was an
> oversight that it wasn't enabled before and it has been enabled
> for some time on the aic7770 chips.  The setting tracks what is
> set in SCSI-Select so its easy to change.  I should have the -current
> driver pulled back into -stable soon (minus the parity stuff).  I'll
> send you a private patch to enable the parity once I do this.

Okay, but make sure that commit message to -stable clearly states that if
you suddenly see SCSI problems on aic7xxx based systems to turn off parity
in the SCSI-Select menu and report the problem.


-- 
Rod Grimes                                      rgrimes@gndrsh.aac.dev.com
Accurate Automation Company                 Reliable computers for FreeBSD