Comment 1 for bug 384156

I guess that the issue is that the udffsck provided by the upstream sources does nothing and is a mere placeholder.

The real problem here is that the upstream udf project is very very dead

http://www.unmaintained-free-software.org/wiki/Linux-udf

Hence, udf support in linux is practically restricted to a write-once or a read-only usage, until someone steps in to resuscitate the project. No option to use it as a substitute for FAT, FAT32 and VFAT.

There was once an ubuntu community member who stepped in to take over the work of ben fennema (PhillipSusi) as shown in https://wiki.ubuntu.com/PacketCD. However this effort too seems to have stalled.