Im following How to copy data from Home to SD card in Recovery Mode (Jolla 1) whereas the article supposed to be for my phone (Xperia X) is only about reverting to a factory reset (and no recovery !!) Xperia-X-devices-How-to-use-the-Recovery-Mode
So, following how to backup data in recovery mode, Im stopped by:
mount -o subvol=@home /dev/mmcblk0p28 /myhome/
mount: mounting /dev/mmcblk0p28 on /myhome/ failed: Invalid argument
mount -t btrfs -o subvol=@home /dev/mmcblk0p28 /myhome
mount: mounting /dev/mmcblk0p28 on /myhome/ failed: Invalid argument
while myhome exists.
$ dmesg
EXT4-fs (dm-0): couldn't mount as ext3 due to feature incompatibilities
EXT4-fs (dm-0): couldn't mount as ext2 due to feature incompatibilities
EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: (null)
FAT-fs (mmcblk1p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
EXT4-fs (mmcblk0p28): Unrecognized mount option "subvol=@home" or missing value
what would that mean for the recovery? Any other suggestions?