xfs_check segfault / xfs_repair I/O error
m3rlin at gmail.com
Thu Apr 19 23:11:54 CDT 2012
Hi Dave / Stan,
Thanks for taking the time to reply. Unfortunately none of the suggestions
were able to recover the data - I'm going to rebuild the array now, but as
RAID6 for the extra level of security.
Thanks again for all your help!
On Mon, Apr 16, 2012 at 8:31 AM, Dave Chinner <david at fromorbit.com> wrote:
> On Sun, Apr 15, 2012 at 11:15:09PM +1000, Drew Wareham wrote:
> > Hello Everyone,
> > Hopefully this is the correct kind of information to send to this list.
> > I have an issue with a large XFS volume (17TB) that mounts, but is not
> > readable. I can view the folder structure on the volume but I can't
> > any of the actual data. A disk failed in a RAID5 array and while it has
> > rebuilt now, it looks like it's caused serious data integrity issues.
> > Here is the CentOS release / Kernel version:
> > [root at svr608 ~]# uname -a
> > Linux svr608 2.6.18-308.1.1.el5 #1 SMP Wed Mar 7 04:16:51 EST 2012
> > x86_64 x86_64 x86_64 GNU/Linux
> > [root at svr608 ~]# cat /etc/redhat-release
> > CentOS release 5.8 (Final)
> > [root at svr608 ~]# cat /tmp/yum.list | grep xfs | grep installed
> > kmod-xfs.x86_64 0.4-2
> > installed
> > xfsdump.x86_64 2.2.46-1.el5.centos
> > installed
> > xfsprogs.x86_64 2.9.4-1.el5.centos
> Try upgrading xfsprogs to the latest version first. this is rather
> old, and the latest versions handle IO errors better...
> > But even though the volume mounts, when trying to access data it just
> > a "Structure needs cleaning" error.
> > Running xfs_check and xfs_repair yield the following:
> > [root at svr608 ~]# xfs_check /dev/cciss/c0d2
> > bad agf magic # 0x58418706 in ag 0
> Oh, that's bad. 2 bytes of the magic number are corrupt...
> > bad agf version # 0x30002 in ag 0
> And the version is completely toast.
> > /usr/sbin/xfs_check: line 28: 5259 Segmentation fault
> > xfs_db$DBOPTS -i -p xfs_check -c "check$OPTS" $1
> > [root at svr608 ~]# xfs_repair -n /dev/cciss/c0d2
> > Phase 1 - find and verify superblock...
> > superblock read failed, offset 0, size 524288, ag 0, rval -1
> > fatal error -- Input/output error
> > And they leave the following in dmesg:
> > xfs_db: segfault at 000000000555a134 rip 00000000004070c3 rsp
> > 00007fff986bae50 error 4
> > cciss 0000:04:00.0: cciss: c ffff810037e00000 has CHECK CONDITION
> > key = 0x3
> This is clearly a raid array error....
> > ................
> > Filesystem cciss/c0d2: XFS internal error xfs_da_do_buf(2) at line
> > of file fs/xfs/xfs_da_btree.c. Caller 0xffffffff8835d9b9
> > hpacucli says the array is fine, but it looks like it's corrupted to me.
> It's badly corrupted. Try a newer version of check/repair, otherwise
> you're in a disaster recovery situation...
> Dave Chinner
> david at fromorbit.com
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