Date: Tue, 27 Sep 2011 23:02:08 +0100 From: peter harrison <four.harrisons@googlemail.com> To: Johan Hendriks <joh.hendriks@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: GEOM_MIRROR GPT table corrupt or invalid Message-ID: <CAA3eX7au3No-WvOz92Gofavk5fqNPTNG%2B0uV8hG3mdj6KaYx1Q@mail.gmail.com> In-Reply-To: <4E824719.8090102@gmail.com> References: <CAA3eX7YXUM03de8HJbYr2f_VBgvKsy-jSsFXAti=e72i6HK8jg@mail.gmail.com> <4E824719.8090102@gmail.com>
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On 27 September 2011 22:58, Johan Hendriks <joh.hendriks@gmail.com> wrote: > peter harrison schreef: > > Hello list, >> >> I have a problem with a software RAID1. This was created under Freenas >> 0.7.2 >> (using the web interface - FreeBSD 7.3 under the hood) which as I >> understand >> it uses GPT and GEOM_MIRROR. This Freenas is running on AMD64 on an ESXi >> 4.1 >> host with the 2 drives for the mirror passed through as raw disks to the >> Freenas guest - if that makes a difference. >> >> This mirror now fails to mount on boot. Checking the boot messages I see >> this straight after the drives are detected: >> >> GEOM: da1: the secondary GPT table is corrupt or invalid. >> GEOM: da1: using the primary only -- recovery suggested >> >> Further on I see: >> >> GEOM_MIRROR: Force device data start due to timeout >> GEOM_MIRROR: Device mirror/data launched (1/2) >> >> The mirror is not mounted when booting is completed - no further messages >> during boot - mount says: >> >> freenas:~# mount >> /dev/da0s1a on / (ufs, local, soft-updates) >> devfs on /dev (devfs, local) >> procfs on /proc (procfs, local) >> >> When I try to mount it manually I get a continually scrolling g_vfs error: >> >> g_vfs_done():mirror/datap1[**READ(offset=-**636932692096956416, length >> =16384)] >> error = 5 >> >> and the guest becomes unresponsive. >> >> GEOM isn't something I'm really familiar with - so any insight on how this >> happened would be interesting. But the main question is, is there anyway >> of >> getting the data off this disk? (I have some backups, but they're not >> complete). >> >> Thanks for any help. >> >> >> >> Peter Harrison. >> >> You can not use gmirror and GPT at the same time on the whole disk. > > Both use the same diskspace to write there meta data. > What you can do is to mirror the partitions seperately. > A nice howto you can find here > http://www.unix-heaven.org/**node/20 <http://www.unix-heaven.org/node/20>; > Thanks Johan, I'll check the link out. This mirror has been running OK for the last 6 months - so perhaps I misunderstood how FreeNAS set it up in the first place? > > You can recover the GPT, but then the mirror can not load. > if you recreate the mirror after that, the gpt label gets corrupt. > No hope of being able to recover any data then? Thanks again, Peter Harrison. > > > regards, > Johan > >
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