Date: Thu, 18 Apr 2002 13:11:56 -0600 (MDT) From: Randy Smith <randys@amigo.net> To: mikea <mikea@mikea.ath.cx> Cc: "freebsd-stable@FreeBSD.ORG" <freebsd-stable@FreeBSD.ORG> Subject: Re: Clarification of kernel log in messages Message-ID: <20020418130515.H2170-100000@stalker.amigo.net> In-Reply-To: <20020418132647.D3021@mikea.ath.cx>
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On Thu, 18 Apr 2002, mikea wrote: > Date: Thu, 18 Apr 2002 13:26:47 -0500 > From: mikea <mikea@mikea.ath.cx> > To: "freebsd-stable@FreeBSD.ORG" <freebsd-stable@FreeBSD.ORG> > Subject: Re: Clarification of kernel log in messages > > On Thu, Apr 18, 2002 at 08:27:15AM -0600, Randy Smith wrote: > > Hi all, > > > > I noticed this in my logs yesterday and I'm not sure what it means. Can > > one of you fine people explain this to me? Do I need to worry about it? > > > > Thank you for your time. > > > > $ uname -a > > FreeBSD pop1.amigo.net 4.4-RELEASE FreeBSD 4.4-RELEASE #3: Thu Sep 27 > > 15:11:13 MDT 2001 root@pop1.amigo.net:/usr/obj/usr/src/sys/POP1 i386 > > > > ---- > > [snip: log entry] > > Looks like a disk I/O request took longer than the watchdog timer > interval, and so the I/O handler dumped all the information it > had about the SCSI card and its state. OK. I guess that makes sense. > > Sending a Bus Device Reset to a disk and aborting 64 SCBs that > were active or pending wastes a lot of work and requires all that > I/O to be redriven. I would consider that a bad thing. See below. > > I would feel a bit unconfortable about it. Maybe even a _lot_ > unconfortable. It's a should-not-occur situation, and may be > your first inkling of an impending failure. That's me wearing > my 37-years-as-a-mainframe-system-programmer hat, but I think > the situation translates well from one arena to the other. > What could cause that, other than impending hardware failure? What can I do to monitor this and/or track down the problem? (Hardware is not my thing, generally.) Thanks for the input. Randy To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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