Slightly off-topic. I have UDF filesystem on a USB flash drive. It works in read/write mode in Linux: # mount -t udf /dev/sda /mnt/ $ mount | grep udf /dev/sda on /mnt type udf (rw,relatime,utf8) But does not work at all in FreeBSD 11-CURRENT: # mount_udf /dev/da0 /mnt/tmp/ mount_udf: /dev/da0: Invalid argument Sergey