[opensuse-support] delete snapshots from btrfs subvolume

Hi, I'm trying to delete snapshots in /.snapshots from my HDD using the rescue disk. mount shows me the partition mounted as rw but if I try to delete a file by hand it says: rm: cannot remove '<path-to-file>': Read-only file system I also tried snapper --no-dbus -r /mnt rm 44 I tried mounting the partition in the following ways: mount /dev/sda6 /mnt mount -o subvol=.snapshots /dev/sda6 /mnt mount -o recovery,nospace_cache,clear_cache /dev/sda6 /mnt But nothing helps. How can I get rid of the snapshots or any other files? Regards, Matthias