e2fsck ext4 with extents possible?

hello,

i'm testing the ext4-filesystem for months now (no data loss experienced ), but i noticed e2fsck not being able to check a ext4-filesystem with extents ("e2fsck: Filesystem has unsupported feature(s)").

i just pulled linus' kernel tree (with the newly added patches to ext4) and e2fsprogs git tree (from git.kernel.org), but still e2fsprogs is not able to check my ext4-fs.

so i wonder whether there's somewhere a patch for e2fsprogs flying around i've missed or whether checking ext4 with extents is simply not supported yet? if so, how's development going on with this?

No released e2fsprogs supports ext4 filesystems with new on-disk features yet; that's partly what the "dev" on the end of "ext4dev.ko" is for. Ted's working on it.

-Eric

There is an e2fsprogs RPM that can check ext4 filesystems with extents, available at ftp://ftp.lustre.org/pub/lustre/other/e2fsprogs/ (no warranties, etc). We've been using this for a while already, and are working to get the patches incorporated into the upstream e2fsprogs in the interim while Ted is reimplementing the extents support.

Note the above RPMs contain patches which are NOT related just to ext4 and should not become part of a distro.

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

thanks for your answer. maybe i'll go testing this (haven't had anything to do with rpm's yet, i'm on ubuntu).

extents are being reimplemented? i think i should read the mailing list more often to get all the news... or is there any other place to see what's being worked on?

regards,
supersud501