From owner-freebsd-questions Fri Apr 3 12:30:36 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA16076 for freebsd-questions-outgoing; Fri, 3 Apr 1998 12:30:36 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from smtp03.primenet.com (smtp03.primenet.com [206.165.6.133]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id MAA16062 for ; Fri, 3 Apr 1998 12:30:26 -0800 (PST) (envelope-from bkogawa@primenet.com) Received: (from daemon@localhost) by smtp03.primenet.com (8.8.8/8.8.8) id NAA18132; Fri, 3 Apr 1998 13:30:25 -0700 (MST) Received: from ip202.sjc.primenet.com(206.165.96.202), claiming to be "foo.primenet.com" via SMTP by smtp03.primenet.com, id smtpd018088; Fri Apr 3 13:30:15 1998 Received: from localhost (bkogawa@localhost) by foo.primenet.com (8.8.8/8.8.6) with SMTP id MAA05023; Fri, 3 Apr 1998 12:30:42 -0800 (PST) X-Authentication-Warning: foo.primenet.com: bkogawa owned process doing -bs Date: Fri, 3 Apr 1998 12:30:42 -0800 (PST) From: "Bryan K. Ogawa" To: Malte Lance cc: questions@FreeBSD.ORG Subject: Re: Advice for diagnosing X hangs / kernel hangs? In-Reply-To: <3.0.32.19980403113026.007430fc@cyclone.degnet.baynet.de> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG [ question about On Fri, 3 Apr 1998, Malte Lance wrote: > At 02:16 03.04.98 -0800, you wrote: > >On Fri, 3 Apr 1998, Malte Lance wrote: > >> I changed the terminating device from CDROM to the tape-drive (SONY > SDT-7000). > >> Then this freezes did not happen as often as they did when the CDROM was > >> terminating my scsi-bus. > >> I suspect TERM-POWER is causing this trouble but i am not sure. > >> I have played with the term-power config a little: > >> 1. no term-power (same as no active terminator) [bad idea] > >> 2. term-power connected just to the terminator, not the scsi-bus [good > idea] > >> 3. term-power connected to the terminator AND the scsi-bus [not so good] > >> Best results gave nr. 2. so far (waiting for the next freeze with this > >> config). > >> My freezes always occur on heavy concurrent diskaccess. > >> My scsi-system: controller, 3 scsi-disks, cdrom, tape, zip. > > > >> Maybe you want to play with your scsi-bus-termination. Let me know about > >> your results. > > > >Hm... I agree with you -- this may be a SCSI problem (see the comments in > >-stable about SCSI stuff). > > ??? "-stable" ? What do you mean ??? BTW: -stable stands for the mailing list freebsd-stable@freebsd.org . I recommend it if you are running anything in 2.2 , especially if you run anything between releases. Since this may be a SCSI problem, I'll probably send a quick note to freebsd-scsi as well. > >I now have a 2nd machine so I can try to telnet when next my system hangs. > > > > No use. Done it already. As i said. When my machine freezes, it is like > shock-frozen, nothing works. Not even a ping comes back when pinging > it. Therefor I dont believe you will be able to telnet into it. Yeah, my system just hung while running the program I supplied and it was unpingable. However, this isn't the symptom that I had heard of previously in the -stable list for SCSI bugs. It may be termination, however. > >I have also had great success in reducing my hangs by running the > >following program from another virtual console: > > This is fighting the symptoms ... no real solution. But for the time, until > a solution is found, it is undoubtly useful. Yes, and if we can find a way to reliably prevent the hangs from software, then it may help in diagnosing the cause. bryan k ogawa http://www.primenet.com/~bkogawa/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message