On Thu, Nov 05, 2020 at 08:05:12AM -0000, Michael van Elst wrote: > mar...@duskware.de (Martin Husemann) writes: > >We could create a new PR about rump devices and sector size, if wanted. > > rump does this via environment variables. E.g.: > > env RUMP_BLKSECTSHIFT=11 mount -o rump -t udf -r /tmp/udf.iso /mnt
That's not really intuitive, let alone documented. > On the other hand, makefs apparently doesn't support the -S option > to create UDF images for non-2k sector sizes. But it does! makefs -t udf -S 1024 -oL="Logvolname" -ov=0x201 somefile.1k /some/dir creates a mountable disc with 1k sector size. Note that all multiples of 512 bytes are allowed in the spec. The option -oT has side effects! If you specify -oT=cdrom or any other format with -oT this will override and set format specific flags. It will at a minimum override the specified sector size and set it to 2K, though without warning. Specifying -oTcdr will create a *writable* CD-R medium and set the maximum size of the FS in the image to standard CD-R media. Specifying -oTcdrw will create a *writable* CD-RW medium with standard max size but will create a full sized image too. Reinoud