make sure that output is not also in the result.
mkfs_xfs $SCRATCH_DEV | _filter_mkfs 2>$tmp.mkfs
source $tmp.mkfs
[ $isize -lt 512 ] && \
mkfs_xfs $SCRATCH_DEV | _filter_mkfs 2>$tmp.mkfs
source $tmp.mkfs
[ $isize -lt 512 ] && \
- mkfs_xfs -isize=512 $SCRATCH_DEV | _filter_mkfs 2>/dev/null
+ mkfs_xfs -isize=512 $SCRATCH_DEV | _filter_mkfs >/dev/null 2>&1
`xfs_db -r -c sb -c p $SCRATCH_DEV | grep 'ino = ' | \
sed -e 's/ //g' -e 's/^/export /'`
`xfs_db -r -c sb -c p $SCRATCH_DEV | grep 'ino = ' | \
sed -e 's/ //g' -e 's/^/export /'`