peter harrison schreef:
On 27 September 2011 22:58, Johan Hendriks <joh.hendr...@gmail.com
<mailto:joh.hendr...@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
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
I had the same issue, i saw the message of the gpt label, but it just
booted.
So i never looked at it in detail.
Until i upgraded to 8.2, then it does not boot anymore.
8.2 just did not boot with a corrupted GPT label.
If you repair the label, you can edit the fstab file to use the normal
filesystems and not the mirrored one.
Then it boot of just one disk, then create the mirrors of the slices as
stated by the webpage.
If you are not sure, disconnect the second drive before doing anything.
It should be accesable in case things really did go wrong through a live
cd or something.
So make sure you can boot of a single disk and work on from there.
regards,
Johan
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