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Thread: EXT4 problem: switch to read-only mode when folder lost+found is accessed


hi,

have weird problem here 9.04 server. have raid 5 disk formatted in ext4 remounted automatically when accessed lost+found folder in root of disk.

error in syslog is:

code:
jan 19 11:14:45 ipf-srv001 kernel: [ 5478.859996] ext4-fs error (device sdb1): ext4_iget: bad extended attribute block 50599009714176 in inode #25338  jan 19 11:14:45 ipf-srv001 kernel: [ 5478.860003] aborting journal on device sdb1:8.  jan 19 11:14:45 ipf-srv001 kernel: [ 5478.860051] remounting filesystem read-only
i ran e2fsck no results.

tried delete can't. it's bit annoying because have prevent users , backups access folder.

idea how can remove folder?

thanks!


pv

hi,


first off, bit of info lost+found directory. it's directory created everytime filesystem check performed. if file system check (fsck) finds corrupt files, dumps them lost+found folder can file dump , there chance of data recovery.

check link out: http://www.tldp.org/ldp/linux-filesy...lostfound.html

in case, directory have been created every time run e2fsck. since directory owned "root" won't able delete unless become superuser.
there issues ext4 waiting sorted out development team. there possibility problem bug.

1 : https://bugs.edge.launchpad.net/ubun...1?comments=all

here resources. [ loong read ! ]


  1. ext4 faster i'm not sure stability.
    http://gmrpgsql.tumblr.com/post/7379...s-ext4-results
  2. this blog theodore ts'o, kernel developer on ext4: http://thunk.org/tytso/blog/2009/03/...-file-problem/
  3. a forum discussion ext3 vs. ext4.: http://ubuntuforums.org/showthread.php?t=1133719

meanwhile, can try checking filesystem bad blocks, filesystem hardware errors might cause lot of data corruption might result in frequent disk checks , consequently, large lost+found directories.

code:
man badblocks
let me know if helps.
--
yogesh girikumar


Forum The Ubuntu Forum Community Ubuntu Specialised Support Ubuntu Servers, Cloud and Juju Server Platforms [ubuntu] EXT4 problem: switch to read-only mode when folder lost+found is accessed


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