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 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..