Hi, when trying to convert an ext3 filesystem to ext4, I'm getting these "Group descriptor 0 checksum is invalid" messages. I've seen them before and the net is full of them, but I still wonder if they're expected to show up at all during the filesystem's first fsck. See below for the script log. Thanks, Christian. sid:~# cat /proc/version Linux version 2.6.32-rc7 (dummy@sid) (gcc version 4.4.2 (Debian 4.4.2-2) ) #1 SMP Sat Nov 14 22:00:51 CET 2009 sid:~# mkfs.ext3 -q /dev/xvdc sid:~# mount -t ext3 /dev/xvdc /mnt/d2 sid:~# grep /dev/xvdc /proc/mounts /dev/xvdc /mnt/d2 ext3 rw,relatime,errors=continue,data=writeback 0 0 sid:~# df -h /dev/xvdc Filesystem Size Used Avail Use% Mounted on /dev/xvdc 16G 173M 15G 2% /mnt/d2 sid:~# umount /dev/xvdc sid:~# tune2fs -O extents,uninit_bg /dev/xvdc tune2fs 1.41.9 (22-Aug-2009) Please run e2fsck on the filesystem. sid:~# tune2fs -l /dev/xvdc | grep -i feat Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent sparse_super large_file uninit_bg sid:~# e2fsck -fpDC0 /dev/xvdc /dev/xvdc: One or more block group descriptor checksums are invalid. FIXED. /dev/xvdc: Group descriptor 0 checksum is invalid. /dev/xvdc: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. (i.e., without -a or -p options) sid:~# e2fsck -fDC0 /dev/xvdc e2fsck 1.41.9 (22-Aug-2009) One or more block group descriptor checksums are invalid. Fix<y>? yes Group descriptor 0 checksum is invalid. FIXED. Group descriptor 1 checksum is invalid. FIXED. [...] Group descriptor 126 checksum is invalid. FIXED. Group descriptor 127 checksum is invalid. FIXED. Pass 1: Checking inodes, blocks, and sizes /dev/xvdc: | [...] Pass 3: Checking directory connectivity Pass 3A: Optimizing directories Rebuilding directory: |================ / 50.0% [...] Pass 5: Checking group summary information /dev/xvdc: |========================================================| 100.0% /dev/xvdc: ***** FILE SYSTEM WAS MODIFIED ***** /dev/xvdc: 11/1048576 files (0.0% non-contiguous), 109874/4194304 blocks sid:~# sid:~# e2fsck -fC0 /dev/xvdc /dev/xvdc: | [...] /dev/xvdc: 11/1048576 files (0.0% non-contiguous), 109874/4194304 blocks -- BOFH excuse #389: /dev/clue was linked to /dev/null -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
