. $tmp.mkfs
cat $tmp.mkfs > "$seqres.full" 2>&1
_scratch_mount
-blksz="$(get_block_size $SCRATCH_MNT)"
+blksz="$(_get_block_size $SCRATCH_MNT)"
# inode core size is at least 176 bytes; btree header is 56 bytes;
# rtrmap record is 32 bytes; and rtrmap key/pointer are 56 bytes.