Re: "missing data block" when converting ext4 to btrfs

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

[-- Attachment #1.1: Type: text/plain, Size: 1450 bytes --]



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


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 488 bytes --]