[Lustre-discuss] filesystem corruption

Andreas Dilger adilger at sun.com
Wed Sep 2 16:31:35 PDT 2009


On Sep 03, 2009  07:16 +0800, ��ǿ�� wrote:
> I have lustre  corrupted when a OSS powered off by ipmi accidentally. I get
> followling messages after that OSS restart.
> ...
> LDISKFS-fs error (device sda): ldiskfs_check_descriptors: Block bitmap for
> group 43776 not in group (block 222298112)!
> Remounting filesystem read-only
> LDISKFS-fs: group descriptors corrupted!
> LustreError: 3901:0:(obd_mount.c:1320:server_kernel_mount()) ll_kern_mount
> failed: rc = -22
> LustreError: 3901:0:(obd_mount.c:1590:server_fill_super()) Unable to mount
> device /dev/sda: -22
> LustreError: 3901:0:(obd_mount.c:1993:lustre_fill_super()) Unable to mount
> (-22)
> 
> Our OSS server is running lustre-1.8.0,equipped with areca RAID adapter with
> write cache enabled.I have a worry about data on lustre  maybe lost.
> And waht's the cause of such a problem?How can I fixed it?

Running with write cache enabled is dangerous and can cause corruption
like this.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.




More information about the lustre-discuss mailing list