debugfs load/dump test
mke2fs -Fq -b 1024 ./test.img 512
Exit status is 127
debugfs -R ''write test.data test_data'' -w ./test.img
Exit status is 127
e2fsck -yf -N test_filesys
Exit status is 127
debugfs -R ''dump test_data test.verify'' ./test.img
Exit status is 127
cmp test.data test.verify
Exit status is 2