Date: Fri, 9 Apr 1999 20:15:35 +0200 (CEST) From: Wilko Bulte <wilko@yedi.iaf.nl> To: ken@plutotech.com (Kenneth D. Merry) Cc: freebsd-scsi@freebsd.org Subject: Re: Getting Pioneer CD changer to work Message-ID: <199904091815.UAA13726@yedi.iaf.nl> In-Reply-To: <199904091714.LAA17078@panzer.plutotech.com> from "Kenneth D. Merry" at "Apr 9, 1999 11:14: 6 am"
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As Kenneth D. Merry wrote ...
> Wilko Bulte wrote...
> > As Kenneth D. Merry wrote ...
> > > Wilko Bulte wrote...
> > > > As Kenneth D. Merry wrote ...
> > > > > Wilko Bulte wrote...
> > > > > > As Kenneth D. Merry wrote ...
> > > > > > > Wilko Bulte wrote...
> > > > > > > > As Kenneth D. Merry wrote ...
> > > > > > > > > Wilko Bulte wrote...
> > > > > > > > > > As Kenneth D. Merry wrote ...
> > > > > > > > > > > Wilko Bulte wrote...
^-- cool
> > > > panic as far as I can see. I'll try to reproduce.. Just the DD seems
> > > > to work just fine.
> > >
> > > Hmm, sounds strange indeed.
> >
> > In the meantime I ran the test again. No machine lockup this time. But
> > already twice a solid lockup of the drive.. It goes completely comatose,
> > not even a SCSI reset from a FreeBSD reboot awakens it. The only thing
> > what works is a whack over the head with the powerswitch. This definitely
> > is a brilliant piece of firmware I have.
> >
> > Console messages:
> >
> > (cd0:isp0:0:5:0): cddone: got error 0x6 back
> > (cd4:isp0:0:5:4): cddone: got error 0x6 back
> > (cd3:isp0:0:5:3): cddone: got error 0x6 back
> > (cd1:isp0:0:5:1): cddone: got error 0x6 back
>
> Hmm, looks somewhat familiar. Error 6 is ENXIO. If you boot with -v you
> might get more info. You can probably fix it by increasing the minimum
> and possibly the maximum changer timeouts. The defaults are 2 seconds and
> 10 seconds, respectively.
The boot messages are OK, so is the probe. I've diagnosed it as
follows:
- probes ok
- works ok for some time (running my test script)
- locks up it's own firmware
- kernel throws away the devices associated with the changer,
thus cddone 0x6 and 'no such device' errors for 'dd'
> Try increasing the minimum to 8 seconds and the maximum to 20:
>
> options "CHANGER_MIN_BUSY_SECONDS=8"
> options "CHANGER_MAX_BUSY_SECONDS=20"
>
> I had similar problems with Lars Fredriksen's Nakamichi changer that I
> borrowed to do the changer functionality in the CD driver. The default
> timeouts may be a little too low, but I think they work okay for that sort
> of changer at least.
In this case it is not the changer. The lockup that happened with me
present was during reads by two parallel operating 'dd's like:
while :
dd <bla>
sleep 5
dd <bla>
done
So, the drive is seeking quite a bit (you can hear that, and observe it
as the case is still off). My guess: the firmware looses track of the
parallel I/Os going on. I'm retesting with a single 'dd' in the loop.
> If you want to try to reset the SCSI bus without rebooting, you can try
> this:
>
> camcontrol reset 3
>
> Where 3 is the bus number. You can find out what bus number your changer
> is on from 'camcontrol devlist -v'. Look for scbus# where "#" is the bus
> number.
Thanks, I'll try that if I get a lockup again.
> The BDR functionality in the kernel doesn't work quite right yet, so if you
> try something just try the bus reset.
>
> > Sidetracking a bit: man xpt mentions /dev/xpt. /dev/MAKEDEV does not
> > have it though. Is it supposed to be a manual operation with mknod?
> > Or is my /dev/MAKEDEV out of date?
>
> The xpt(4) man pages mentions /dev/xpt0. If your MAKEDEV doesn't have it,
> it's out of date:
>
> {roadwarrior:/usr/home/ken/perforce/cam/etc/etc.i386:26:0} grep xpt MAKEDEV
>
> sh MAKEDEV pass4 xpt2 # cdev, CAM
> xpt*)
> name=xpt
> units=`expr $i : 'xpt\(.*\)'`
>
>
> That's from -current as of about 3am MDT today. All you need to do is grab
> a new copy of MAKEDEV, and then:
Right. It proved to be in my -current source tree alright. Apparantly it
did not get installed by the 'installworld' for some reason ?? My testbox
started off as a 2.2.6 CD install. Ah well, it is there now. camcontrol
is happy.
If we ever meet, I definitely owe you a couple of beers ;-)
Groeten / Cheers,
Wilko
_ ______________________________________________________________________
| / o / / _ Arnhem, The Netherlands
|/|/ / / /( (_) Bulte WWW : http://www.tcja.nl
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