I don't seem to be able to find any links on this. I would like to create a UDF filesystem on a memory stick so that it is compatible with Linux, Windows (Vista upwards) and NetBSD. When I created a UDF filesystem on a memory stick in Windows 8.1 I discovered to my surprise Dolphin in Slackware refused to mount it, although NetBSD mounted it no problem and I was able to write to the device from both Windows and NetBSD.

The command I used at an elevated prompt in Windows was as follows:
So how does a user a) create a UDF filesystem on a USB flash drive attached to a Slackware system and b) mount that device read-write? I see a lot of references on Google to mkudffs, but this utility doesn't seem to be included with Slackware. I looked at mkisofs but this seems to me to be intended for the creation and one-off population of a filesystem. I just want to create a filesystem and populate it at random afterwards.

Thank you.

udftools

Find it on http://slackbuilds.org

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Thank you. A little surprised I didn't think of that but I expected UDF to be part of a default install. I assume UDF isn't quite as mainstream as the name Universal Disk Format suggests?

No, UDF is hardly used. I have an older system which is set up to use UDF on CD-RW's -which lets them act like a big floppy disk, where you can add *and* remove stuff. The udftools used to create FS's which could be at least read by windows 98/2000 and maybe XP. I have my doubts about them being readable by later windows systems, but it's worth a try -especially on an erasable FLASH drive.

I addressed this very issue in this post, and the referenced website says specifically that UDF is supported by modern versions of Windows.

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UDF isn't as widely used as formats like exFAT and NTFS are with portable devices for storage. Mostly you'll find Flash media with FAT32 partitioning or exFAT for maximum compatibility purposes and NTFS or exFAT on portable hard drives.

As mentioned UDF is mostly used for optical media disks.

I see no reason UDF wouldn't work for any storage drive, but you'll want to ensure any PC you use it on does in fact support it fully as that type of media too.

Bizarre coincidence! Thanks!

You're welcome. Glad to help.