This feature is called LFN (for Long File Names) and uses “dummy” interleaved file records for storing those longer names. vFAT or not vFATĪfter googling a bit, I discovered that something called vFAT allows having file names longer than 8 characters on any FAT partition. $ sudo mdir -i $(( 4 * 1536 * 1024 )) ::īut when attempting to extract those files, neither of Floppy Emulator, mount + cp, mtools’ mcopy or usbfd will allow getting (at best) a single of those files. We can directly mount a virtual floppy to see its content: Under Linux, we have a wide range of possibilities. There is also an official Gotek software which is said to mostly not work. Mounting floppiesĭepending on your OS, there are several solutions for mounting virtual floppies from a Gotek-formatted USB drive on your computer.įor Windows, the best solution is Ipcas GmbH’s Floppy Emulator that works fairly well but needs to be executed as an admin on recent Windows 10 versions. I don’t know if this higher value corresponds to rounding due to fixed sized blocks / segments / whatever or if I’m actually truncating data. Floppies have a size of 1440 kB but we need to jump 1536 to go from one to another. NB: I’m not 100% sure about the value for count. $ $ # in any case, we can verify we have a valid image using mdir from mtools $ mdir -i ~/Documents/backup_gotek_ $MY_FLOPPY_ID.img :: $ # extract an image of a single vFloppy from it $ dd if =~/Documents/backup_gotek_all.img \ of =~/Documents/backup_gotek_ $MY_FLOPPY_ID.img \ skip = $(( 4 * 1536 * 1024 )) bs =512c count = $(( 1440 * 1024 )) \ iflag =skip_bytes,count_bytes conv =noerror $ $ # make an image of a whole USB drive $ sudo dd if =/dev/sdb of =~/Documents/backup_gotek_all.img ~/Documents/backup_gotek_ $MY_FLOPPY_ID.img $ # make a single vFloppy image $ MY_FLOPPY_ID =1
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