_scratch_mkfs "--nodesize 65536" >>$seqres.full 2>&1
_scratch_mount
-BLOCK_SIZE=$(get_block_size $SCRATCH_MNT)
+BLOCK_SIZE=$(_get_block_size $SCRATCH_MNT)
EXTENT_SIZE=$((2 * $BLOCK_SIZE))
$XFS_IO_PROG -f -d -c "pwrite 0 $EXTENT_SIZE" $SCRATCH_MNT/foo \