Re: NILFS: bad btree node

[Vyacheslav Dubeyko <slava-yeENwD64cLxBDgjK7y7TUQ@public.gmane.org>]

Hi,

On Thu, 2012-12-20 at 10:46 +0800, 张 磊 wrote:
> Hello.
> 	My nilfs suddenly become read-only. I saw these logs in /var/log/messages:
> 
> Dec 19 11:20:05 localhost kernel: NILFS: bad btree node (blocknr=710153406): level = 0, flags = 0x2, nchildren = 25088
> Dec 19 11:20:05 localhost kernel: NILFS error (device sdb2): nilfs_bmap_lookup_contig: broken bmap (inode number=321775)
> Dec 19 11:20:05 localhost kernel:
> Dec 19 11:20:05 localhost kernel: Remounting filesystem read-only
> Dec 19 11:20:05 localhost kernel: NILFS: bad btree node (blocknr=710153406): level = 0, flags = 0x2, nchildren = 25088
> Dec 19 11:20:05 localhost kernel: NILFS error (device sdb2): nilfs_bmap_lookup_contig: broken bmap (inode number=321775)
> Dec 19 11:20:05 localhost kernel:
> Dec 19 11:20:05 localhost kernel: NILFS: bad btree node (blocknr=710153406): level = 0, flags = 0x2, nchildren = 25088
> Dec 19 11:20:05 localhost kernel: NILFS error (device sdb2): nilfs_bmap_lookup_contig: broken bmap (inode number=321775)
> Dec 19 11:20:05 localhost kernel:
> Dec 19 11:20:05 localhost kernel: NILFS: bad btree node (blocknr=710153406): level = 0, flags = 0x2, nchildren = 25088
> Dec 19 11:20:05 localhost kernel: NILFS error (device sdb2): nilfs_bmap_lookup_contig: broken bmap (inode number=321775)
> Dec 19 11:20:05 localhost kernel:
> ……………………………………………………
> 
> 	How can I fix this? There is 6TiB data on my disk, I don't want to format the disk.
> 	I found that a lot of people have encountered the same problem. Is this a bug of nilfs? How can I avoid this problem? When it happens, I was running multiple MySQL and rsync, and nilfs_cleanerd was cleaning segments.
> 

Yes, this issue was reported earlier. As I understand, you can simply
remount your filesystem in read-write mode and to continue using your
NILFS2 filesystem.

If you will encounter any troubles with remounting, please, report about
it.

With the best regards,
Vyacheslav Dubeyko.


> Elmer Zhang--
> To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html


--
To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html