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: <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 > >> > >> _______________________________________________ > >> [EMAIL PROTECTED] mailing list > >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions > >> To unsubscribe, send any mail to > >> "[EMAIL PROTECTED]" > > > -- > > ::: Jesse Reynolds +61 (0)414 669 790 ::: AIM - jessedreynolds ::: > ::: Virtual Artists Pty Ltd, Adelaide ::: http://www.va.com.au ::: > _______________________________________________ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[EMAIL PROTECTED]" _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"