Public bug reported: Hello!
Btrfs-convert fails to convert and corrupts an EXT4 filesystem, please see the example below. The kernel developers are aware of this problem and the fix has been applied after the current 5.7.1 version. Please apply the patch or jump to the fixed version in the repo. I used the btrfs-progs_5.10-1_amd64.deb package from the dev branch and it worked! Regards https://github.com/kdave/btrfs-progs/commit/c9c4eb1f3fd343512d50b075b40bba656cbd02cb https://bugzilla.kernel.org/show_bug.cgi?id=206995 https://www.spinics.net/lists/linux-btrfs/msg103379.html xubuntu@xubuntu:/tmp$ sudo btrfs-convert /dev/nvme0n1p1 create btrfs filesystem: blocksize: 4096 nodesize: 16384 features: extref, skinny-metadata (default) checksum: crc32c creating ext2 image file ERROR: missing data block for bytenr 1048576 ERROR: failed to create ext2_saved/image: -2 WARNING: an error occurred during conversion, filesystem is partially created but not finalized and not mountable xubuntu@xubuntu:/tmp$ sudo fsck.ext4 -f -y /dev/nvme0n1p1 . . . Pass 3: Checking directory connectivity Pass 4: Checking reference counts Inode 4001 (...) is an illegal FIFO. Clear? yes Inode 4002 (...) has invalid mode (00). Clear? yes Inode 4003 ref count is 192, should be 1. Fix? yes Inode 4005 (...) has invalid mode (00). Clear? yes Pass 5: Checking group summary information Free blocks count wrong for group #0 (75, counted=76). Fix? yes Free blocks count wrong (31948715, counted=31948716). Fix? yes Free inodes count wrong for group #0 (962, counted=959). Fix? yes Free inodes count wrong (12276349, counted=12276346). Fix? yes /dev/nvme0n1p1: ***** FILE SYSTEM WAS MODIFIED ***** /dev/nvme0n1p1: 830854/13107200 files (0.3% non-contiguous), 20480084/52428800 blocks ** Affects: btrfs-tools (Ubuntu) Importance: Undecided Status: New ** Tags: btrfs btrfs-convert bug convert corrupt ext4 filesystem -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1913527 Title: btrfs-convert fails and corrupts ext4 FS because of bit overflow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/btrfs-tools/+bug/1913527/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
