_scratch_mount
echo "+ chattr -R -i"
-chattr -R -f -i "${SCRATCH_MNT}/"
+$CHATTR_PROG -R -f -i "${SCRATCH_MNT}/"
echo "+ modify xattr (2)"
getfattr "${SCRATCH_MNT}/attrfile" -n "user.x00000000" > /dev/null 2>&1 && (setfattr -x "user.x00000000" "${SCRATCH_MNT}/attrfile" || _fail "remove corrupt xattr")