Date: Fri, 5 Sep 2003 16:07:50 +1000 From: jesse reynolds <jesse@va.com.au> To: Ruben de Groot <mail23@bzerk.org> Cc: questions@freebsd.org Subject: Re: RAID1 is DEGRADED, but which disk is faulty? Message-ID: <a06001a15bb7dcaa9e022@[129.94.41.148]> In-Reply-To: <20030903162614.GB38375@ei.bzerk.org> References: <a06001a02bb7b8fd4603a@[10.0.1.30]> <20030903162614.GB38375@ei.bzerk.org>
next in thread | previous in thread | raw e-mail | index | archive | help
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. 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. 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? Thankyou Jesse > >Ruben > >> Cheers >> >> Jesse >> >> PS: >> >> FreeBSD 4.6.2-RELEASE >> >> atapci1: <Promise ATA100 controller> port >> 0xdc00-0xdc3f,0xe000-0xe003,0xe400-0xe407,0xe800-0xe803,0xec00-0xec07 >> mem 0xdffe0000-0xdfffffff irq 11 at device 16.0 on pci0 >> >> ar0: 76293MB <ATA RAID1 array> [9726/255/63] status: READY subdisks: >> 0 READY ad4: 76319MB <ST380021A> [155061/16/63] at ata2-master UDMA100 >> 1 READY ad6: 76319MB <ST380021A> [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 <LG DVD-ROM DRD-8160B/1.01> ATA/ATAPI rev 0 >> Slave: no device present >> ATA channel 2: >> Master: ad4 <ST380021A/3.19> ATA/ATAPI rev 5 >> Slave: no device present >> ATA channel 3: >> Master: ad6 <ST380021A/3.19> 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 :::
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?a06001a15bb7dcaa9e022>