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I'm always mildly surprised that UDF, the filesystem for DVD discs, isn't used more on USB sticks. It's r/w on the major three operating systems. The only downside is that I think you need to create it in the first place on Linux. (Maybe macOS can format UDF too?)

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The major OSs all behave differently depending on if the media with the UDF volume has a partition table or not, among other strange implementation quirks, because nobody expects it to be used outside of optical media.

But since UDF reserves the first 2 KB, you can put a partition table on your medium, and let the first partition start at sector 0. Usually partition programs complain about this, but the file system driver lets it pass.

True, but it's a hack. And as far as I can UDF still suffers from the unix permissions issue.

There used to be a bug in the Linux version of the filesystem that prevented partitions of above 70MB or so to be created (shortints FTW!); however, that is fixed now.

Far worse is it that there is no good, unencumbered (looking at you CDDL license) version of UDF fsck.

Are you trying to imply the CDDL code is somehow “encumbered”?

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