sudo modprobe loop
mkdir /myssd2_data/tmp
dd if=/dev/zero of=/myssd2_data/tmp/test.ext4 bs=1G count=20
losetup --find --show test.ext4
shows /dev/loop0
sudo mkfs.ext4 /dev/loop0
fsarchiver restfs myssd2_data/backup-data----.fsa id=0,dest=/dev/loop0
mkdir /myssd2_data/tmp/tmp
sudo mount /dev/loop0 tmp
ls tmp/*
sudo umount tmp
rm test.ext4
losetup -d /dev/loop0
sudo rmmod loop