Hi,
It looks like i am hit with the 3ware bug that causes data
corruption
when rebuilding a raid6 volume -
http://unix.derkeiler.com/Mailing-Lists/FreeBSD/hackers/2007-10/msg00060.html
http://www.3ware.com/support/UserDocs/RAID6-data-integrity-customer-notification_061907-FINAL.pdf
Is it possible to recover the Lustre volumes at least partially? I have
one volume with up to date tape and disk based backups
that has all the important data and another volume which is quite big
which is a scratch volume with no backup.
Thanks
Balagopal
-------- Original Message --------
Subject: [Lustre-discuss] filesystem corruption
Date: Fri, 08 Aug 2008 13:27:29 -0300
From: Balagopal Pillai <pillai at mathstat.dal.ca>
Reply-To: pillai at mathstat.dal.ca
Organization: Department of Mathematics and Statistics
To: Lustre discuss <lustre-discuss at lists.lustre.org>
Hi,
The storage server that served Lustre had a drive
failure on the 3ware 9650 raid6 array and it seemed to
rebuild fine. But almost all volumes in that array seems to have
filesystem corruption. The partitions with OS
didn''t boot after i did the fsck as it deleted lots of inodes (entire
directory with lustre kernel and lots of config files went missing!).
Now the server is up and running again and i am trying to recover the
lustre volumes. After the fsck, the mdt mounted fine, but ost doesn''t
mount. It gives the following errors. The running version of Lustre
before was 1.6.0.1 on centos 4 x86_64. The new install is centos 5
x86_64 and lustre version 1.6.5.1 -
mount.lustre: mount /dev/sda7 at /ost-home failed: No such file or directory
Is the MGS specification correct?
Is the filesystem name correct?
If upgrading, is the copied client log valid? (see upgrade docs)
(from dmesg)
LDISKFS FS on sda7, internal journal
LDISKFS-fs: mounted filesystem with ordered data mode.
LustreError: 3202:0:(obd_mount.c:247:ldd_parse()) cannot open
CONFIGS/mountdata: rc = -2
LustreError: 3202:0:(obd_mount.c:1264:server_kernel_mount()) premount
parse options failed: rc = -2
LustreError: 3202:0:(obd_mount.c:1560:server_fill_super()) Unable to
mount device /dev/sda7: -2
LustreError: 3202:0:(obd_mount.c:1951:lustre_fill_super()) Unable to
mount (-2)
/dev/sda7 does exist. So i have decided against running fsck on
the other bigger Lustre volumes for now.
Is it possible to get sda7 mounted any other way? Thanks very much for
any suggestions and help.
Regards
Balagopal
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