On 2020/7/14 上午3:46, Christian Zangl wrote: > I am on a test VM where I am trying to convert a second disk to btrfs. > > The conversion fails with the error missing data block for bytenr > 1048576 (see below). > > I couldn't find any information about the error. What can I do to fix this? > > $ fsck -f /dev/sdb1 > fsck from util-linux 2.35.2 > e2fsck 1.45.6 (20-Mar-2020) > Pass 1: Checking inodes, blocks, and sizes > Pass 2: Checking directory structure > Pass 3: Checking directory connectivity > Pass 4: Checking reference counts > Pass 5: Checking group summary information > /dev/sdb1: 150510/4194304 files (0.5% non-contiguous), 2726652/16777216 > blocks > > $ btrfs-convert /dev/sdb1 > 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 Can btrfs-convert -r rollback the fs? If you can rollback, would you provide the ext4 fs image? Thanks, Qu > > $ uname -a > Linux t-arch 5.7.7-arch1-1 #1 SMP PREEMPT Wed, 01 Jul 2020 14:53:16 > +0000 x86_64 GNU/Linux > > $ btrfs --version > btrfs-progs v5.7
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