On 13.09.2018 15:22, Serhat Sevki Dincer wrote:
> Hi,
>
> I have an external usb HDD (WD my passport, just usb cable, no
> external power) with a single ext4 partition occupying the whole disk
> with 698 GiB capacity and 188 GiB empty space. The data on disk is not
> very important.
>
> I also have a laptop with Manjaro 64-bit XFCE, kernel 4.14.68,
> btrfs-progs v4.17.1, all packages come with Manjaro.
>
> I tried to convert my disk to btrfs with
> sudo btrfs-convert /dev/sdb1
> I have also tried -i, -n options, all failed with:
>
> create btrfs filesystem:
> blocksize: 4096
> nodesize: 16384
> features: extref, skinny-metadata (default)
> creating ext2 image file
> ERROR: failed to create ext2_saved/image: -1
-1 seems to be EPERM, is your device write-protected, readonly or
something like that ?
> WARNING: an error occurred during conversion, filesystem is partially
> created but not finalized and not mountable
>
> I could not find this error/warning combo on the net.
> ext4 partition seems intact and working after these attempts.
> How can I debug and complete this conversion?
>
> Thanks..
>
