ISO images with UDF are not mounted correctly

[Pippo]

Hello,

Unfortunately, unetbootin does not recognize ISO images with an UDF filesystem inside. Note that genisoimage (formerly called mkisofs) can add UDF support to ISO images with the -allow-limited-size option. UDF gives support for big files, which is useful for big desktops on dual layer DVDs (more than 4,7GB). This kind of ISO image **must** be mounted with the "-t udf" filesystem option to see the correct size of those big files (tipically filesystem.squashfs) . On the contrary, if you pass "-t auto" or "-t iso9660", although the filesystem can still be mounted without complaints, the size is NOT reported correctly, as big files will be trunkated and no useful operations could be done on them in this case.

It would be nice if unetbootin could handle ISO/UDF images as well. I think it would not be a big change to the code.

Thanks for your support.

[Geza Kovacs (gezakovacs)]

I actually use 7-zip to extract the ISO images, which (supposedly) already supports extracting from UDF-formatted disk images. Assuming your filesystem.squashfs is over 4 GB, the issue that's being encountered here most likely has to do with the FAT32 filesystem's 4-gigabyte file limit which I can't do anything about. If the individual files are all less than 4 GB apiece though please let me know because then that's another issue.

[DukeyToo (dukeytoo)]

7zip does support it, but I think the support was broken around 4.63 or so, and its definitely fixed for 4.65. It did not exist prior to 4.59.

I don't see this in the 7z release notes anyway, but that was my experience - when I upgraded to 4.65 (from 4.63?), it could open the iso, but not before.

Perhaps you can update the 7zip bits to latest?