Re: fsck.ext4: Group descriptors look bad... trying backup blocks...

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On Apr 20, 2009  19:55 +0100, Jeremy Sanders wrote:
> On Mon, 20 Apr 2009, Andreas Dilger wrote:
>> On Apr 20, 2009  16:53 +0100, Jeremy Sanders wrote:
>>> On Mon, 20 Apr 2009, Eric Sandeen wrote:
>>>> One other question - do you make use of xattrs on this filesystem?
>>>
>>> No.
>>
>> If you use anything like SELinux or ACLs you would also (indirectly) be
>> using xattrs.
>
> SELinux is switched off and we haven't (knowingly) been using xattrs, but 
> I remember rsync might copy copy xattrs, so perhaps they get written in  
> some way...

You can check this with:

	debugfs -c -R "stat {path to file inside filesystem}" /dev/XXX

and check if the "File ACL" field is non-zero:

debugfs -c -R "stat etc/hosts" /dev/sda2
debugfs 1.40.11.sun1 (17-June-2008)
/dev/sda2: catastrophic mode - not reading inode or group bitmaps
Inode: 259128   Type: regular    Mode:  0644   Flags: 0x0   Generation:
2075236634
User:     0   Group:     0   Size: 2258
File ACL: 0    Directory ACL: 0
^^^^^^^^^^^ ##### this would be non-zero #####

Links: 2   Blockcount: 8
Fragment:  Address: 0    Number: 0    Size: 0
ctime: 0x49812ef4 -- Wed Jan 28 21:22:12 2009
atime: 0x49ebdce3 -- Sun Apr 19 20:24:35 2009
mtime: 0x49812ef4 -- Wed Jan 28 21:22:12 2009
Size of extra inode fields: 4
Inode version: 0
BLOCKS:
(0):534546
TOTAL: 1



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

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