From owner-freebsd-questions@FreeBSD.ORG Fri Sep 5 01:39:44 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4459916A4BF for ; Fri, 5 Sep 2003 01:39:44 -0700 (PDT) Received: from ei.bzerk.org (ei.xs4all.nl [213.84.67.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0185843FE3 for ; Fri, 5 Sep 2003 01:39:42 -0700 (PDT) (envelope-from mail23@bzerk.org) Received: from ei.bzerk.org (BOFH@localhost [127.0.0.1]) by ei.bzerk.org (8.12.9/8.12.9) with ESMTP id h858eNna008065; Fri, 5 Sep 2003 10:40:23 +0200 (CEST) (envelope-from mail23@bzerk.org) Received: (from bulk@localhost) by ei.bzerk.org (8.12.9/8.12.9/Submit) id h858eLCw008063; Fri, 5 Sep 2003 10:40:21 +0200 (CEST) X-Authentication-Warning: ei.bzerk.org: bulk set sender to mail23@bzerk.org using -f Date: Fri, 5 Sep 2003 10:40:21 +0200 From: Ruben de Groot To: jesse reynolds Message-ID: <20030905084021.GA7934@ei.bzerk.org> References: <20030903162614.GB38375@ei.bzerk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i cc: questions@freebsd.org Subject: Re: RAID1 is DEGRADED, but which disk is faulty? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Ruben de Groot List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Sep 2003 08:39:44 -0000 On Fri, Sep 05, 2003 at 04:07:50PM +1000, jesse reynolds typed: > At 18:26 +0200 3/9/2003, Ruben de Groot wrote: > >On Wed, Sep 03, 2003 at 10:45:05PM +1000, jesse reynolds typed: > >> Hi > >> > >> How do you tell which disk has problems in a hardware RAID1 array? My > >> machine has been up for nearly six months, and only the last three > >> weeks of messages logs are retained. There is nothing any in the last > >> three weeks of system logs about any kind of hardware error, or > >> warning, or anything mentioning ar0, ad4, or ad6. > >> > > > atacontrol is showing a DEGRADED status of the mirror: > >> > >> # atacontrol status ar0 > >> ar0: ATA RAID1 subdisks: ad4 ad6 status: DEGRADED > >> > >> > >> How does one tell which disk is faulty? Or is it possible that > >> they've become out of sync and need rebuilding, in which case which > >> one do I detach and reattach? > >> > >> I'm scared to reboot as it's a running server. What can I do???? > > > >You can try this: > > > >umount /dev/ar0 > >fsck -f -n /dev/ad4 > >fsck -f -n /dev/ad6 > > > >This way (hopefully) you'll be able to establish which one of the disks > >in the array has developed problems. Then reboot and rebuild the array > >from the other disk using the controllers firmware. > > > Given that all the filesystems, including /, are on this mirror ar0, > I would have to boot it up off a live CD or some such in order to do > an fsck on both the submirrors. Ah yes, in this case that's probably the safest way. > Hmmm. I wouldn't be able to do an fsck on /dev/ad4 or /dev/ad6 though > because they are not filesystems, they're the full disks which in > turn contain freebsd slices. Replace ad4, ad6 with the names of your partitions, eg ad4s1a etc. > Is it safe to shut it down and see what the Promise firmware is > saying? Or will i then lose the ability to tell which disk is good > and which has problems? Not very probable. But since your filesystems are still usable, you could make a backup, just to be on the safe side. good luck, Ruben > Thankyou > > Jesse > > > > > > > >Ruben > > > >> Cheers > >> > >> Jesse > >> > >> PS: > >> > >> FreeBSD 4.6.2-RELEASE > >> > >> atapci1: port > >> 0xdc00-0xdc3f,0xe000-0xe003,0xe400-0xe407,0xe800-0xe803,0xec00-0xec07 > >> mem 0xdffe0000-0xdfffffff irq 11 at device 16.0 on pci0 > >> > >> ar0: 76293MB [9726/255/63] status: READY subdisks: > >> 0 READY ad4: 76319MB [155061/16/63] at ata2-master UDMA100 > >> 1 READY ad6: 76319MB [155061/16/63] at ata3-master UDMA100 > >> > >> > >> # atacontrol list > >> ATA channel 0: > >> Master: no device present > >> Slave: no device present > >> ATA channel 1: > >> Master: acd0 ATA/ATAPI rev 0 > >> Slave: no device present > >> ATA channel 2: > >> Master: ad4 ATA/ATAPI rev 5 > >> Slave: no device present > >> ATA channel 3: > >> Master: ad6 ATA/ATAPI rev 5 > >> Slave: no device present > >> > >> _______________________________________________ > >> freebsd-questions@freebsd.org mailing list > >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions > >> To unsubscribe, send any mail to > >> "freebsd-questions-unsubscribe@freebsd.org" > > > -- > > ::: Jesse Reynolds +61 (0)414 669 790 ::: AIM - jessedreynolds ::: > ::: Virtual Artists Pty Ltd, Adelaide ::: http://www.va.com.au ::: > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"