Date: Sat, 22 Sep 2001 00:42:23 +0200 From: "Karel J. Bosschaart" <karelj@wop21.wop.wtb.tue.nl> To: David Kelly <dkelly@hiwaay.net> Cc: questions@FreeBSD.ORG Subject: Re: first CD burner fails while starting second (cdrecord) Message-ID: <20010922004223.B57674@wop21.wop.wtb.tue.nl> In-Reply-To: <20010920123110.B63111@grumpy.dyndns.org>; from dkelly@hiwaay.net on Thu, Sep 20, 2001 at 12:31:10PM -0500 References: <karelj@wop21.wop.wtb.tue.nl> <200109200227.f8K2RBG59500@grumpy.dyndns.org> <20010920135134.A29683@wop21.wop.wtb.tue.nl> <20010920123110.B63111@grumpy.dyndns.org>
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On Thu, Sep 20, 2001 at 12:31:10PM -0500, David Kelly wrote: > On Thu, Sep 20, 2001 at 01:51:34PM +0200, Karel J. Bosschaart wrote: > > On Wed, Sep 19, 2001 at 09:27:11PM -0500, David Kelly wrote: > > > > > > Years ago when I last had an SGI Irix system, cdrecord locked out all > > > other I/O and processes for about 10 seconds when it started burning a > > > CD. Not the 10 second countdown, but after that. If another cdrecord was > > > running on another device I'd bet that device would be starved during > > > this period. And that could be what you are seeing. > > > > > Then I would expect that it also fails when I change the order (start > > 0,4,0 while 0,6,0 is burning) but that is not the case. Or maybe that > > burner somehow can handle the lockout. I'll try swapping the SCSI id's > > and see what happens. > > They are both on the same SCSI bus but the problem doesn't happen if you > start the burns in the other order? > Yes, that's the case. Meanwhile I swapped the SCSI id's and it turned out that the problem follows the CD burner, not the SCSI id. > Am thinking something similar may be happening with your two different > CD-RW drives. When one starts it doesn't free the SCSI bus for a long > time when starting. Causes the other to starve for data. Might watch the > flashing LED's on the CD-RW drives and the HD (HD on same cable, > right?). > No, the SCSI controller only has the two CD burners, the HD is on a separate controller. > If my suspicion is right there isn't anything you can do about it other > than replace one of the CD-RW drives (I'd like to know which is the > problem so to avoid that brand in the future) or place the offending > drive on a SCSI controller all to itself. > The Plextor PX-W4220T fails when the HP CD-Writer+ 9200 is started to burn a CD. SCSI controller is a NCR810, if that matters (sym driver). Karel. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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