Date: Sat, 28 Jan 2012 17:57:45 -0500 From: Lee Dilkie <lee@dilkie.com> To: freebsd-geom <freebsd-geom@freebsd.org> Subject: Re: gmirror question, drive missing Message-ID: <4F247D69.6000105@dilkie.com> In-Reply-To: <4F24785F.20607@dilkie.com> References: <4F24785F.20607@dilkie.com>
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additional. like I said, the original setup had the drives swapped. ad10, now ad11, was the source of the failure. from the log files.. +ad10: TIMEOUT - READ_DMA48 retrying (1 retry left) LBA=1740673583 +ad10: FAILURE - READ_DMA48 status=51<READY,DSC,ERROR> error=10<NID_NOT_FOUND> LBA=1740673583 +GEOM_MIRROR: Request failed (error=5). ad10[READ(offset=891224874496, length=4096)] +GEOM_MIRROR: Device gm0: provider ad10 disconnected. On 1/28/2012 5:36 PM, Lee Dilkie wrote: > Hi Folks, > > I'm hoping freebsd-goem is the correct place for this question. > > I had a server crash that had a gmirror array of two drives. It was my > bootable disk and it failed in such a way that it wouldn't recover > without swapping cables. > > So the original gmirror, gm0, had /dev/ad10 and /dev/ad11 as providers. > > Now, gmirror shows. > > $ gmirror status gm0 > Name Status Components > mirror/gm0 DEGRADED ad10 > > $ gmirror list gm0 > Geom name: gm0 > State: DEGRADED > Components: 2 > Balance: round-robin > Slice: 4096 > Flags: NONE > GenID: 1 > SyncID: 2 > ID: 1837199655 > Providers: > 1. Name: mirror/gm0 > Mediasize: 1000204885504 (931G) > Sectorsize: 512 > Mode: r5w5e6 > Consumers: > 1. Name: ad10 > Mediasize: 1000204886016 (931G) > Sectorsize: 512 > Mode: r1w1e1 > State: ACTIVE > Priority: 0 > Flags: DIRTY > GenID: 1 > SyncID: 2 > ID: 3835414526 > > no mention of /dev/ad11 at all. > > however, I can dump the metadata and it's there, as far as I can tell. > > $ gmirror dump /dev/ad11 > Metadata on /dev/ad11: > magic: GEOM::MIRROR > version: 4 > name: gm0 > mid: 1837199655 > did: 1856327785 > all: 2 > genid: 0 > syncid: 2 > priority: 0 > slice: 4096 > balance: round-robin > mediasize: 1000204885504 > sectorsize: 512 > syncoffset: 0 > mflags: NONE > dflags: DIRTY > hcprovider: > provsize: 1000204886016 > MD5 hash: 5ac5a19c7e0b99b4852ba535297d413a > > and the working, ad10... > > $ gmirror dump /dev/ad10 > Metadata on /dev/ad10: > magic: GEOM::MIRROR > version: 4 > name: gm0 > mid: 1837199655 > did: 3835414526 > all: 2 > genid: 1 > syncid: 2 > priority: 0 > slice: 4096 > balance: round-robin > mediasize: 1000204885504 > sectorsize: 512 > syncoffset: 0 > mflags: NONE > dflags: DIRTY > hcprovider: > provsize: 1000204886016 > MD5 hash: 13cc9220591eb360cbdaea72edbe87d9 > > so what's happened? Do I simply perform a "gmirror insert gmo > /dev/ad11" to re-setup the mirror or should something else be done? > > BTW, when I performed all my failure mode tests before, I never saw a > provider disappear, gmirror simply rebuilt the array when the disk was > plugged in. And I did move disks around the sata cables so they were > both masters instead of the master/slave I had originally used with > the mirror was set up, so I don't *think* swapping the sata cables did > this but.... > > TIA, > > -lee > > > >
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