RedHat had modified some specification of ext2 by patching to e2fsprogs arbitrarily. So the ext2 on EL4 is not used to be.

If you make filesystems on EL4, you have no way to mount them on EL3. Of course, you can do it after mke2fs on EL3 again. Necessarily, Cent 4.x is polluted by it. ;)

I need to downgrade a system from Centos x4.2 to v3.6 (x86) due to performance problems with Arkeia Network Backup and AIT-4 tape drives. The backup database is stored on a v4.2 created ext3 partition. When accessing this partition after the downgrade, Centos complains on boot that

fsck.ext3: Filesystem has unsupported feature(s) (/dev/sda5) *fsck: Get a newer version of e2fsck! [fail]

If I comment the partition out of /etc/fstab the machine boots as normal and I can manually mount the filesystem.

My questions are:

If I use the v4.2 ext3 filesystem on v3.6 I am likely to corrupt the data? And what is the best way fix this problem? Do as it says and try and upgrade e2fsck or is there a better fix?

Thanks

Dean. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos