Merge of master-melb:xfs-cmds:29995a by kenmcd.
Check if there is enough disk space to run this test..
_scratch_mkfs_xfs >/dev/null 2>&1
_scratch_mount
+# Do we have enough space on disk?
+FREE_BLOCKS=`df -kl $SCRATCH_MNT | grep -v Filesystem | awk '{print $4}'`
+[ $FREE_BLOCKS -lt 10485760 ] && _notrun "This test requires at least 10GB of \
+ $SCRATCH_DEV to run"
+
_check_files()
{
# check file size and contents