I've looked around the internet a lot and mostly didn't find any working solution apart from trying to make an image/virtualDisk from a raw physical disk (USB). I was basically experimenting with writing simple bootloaders in assembly language, and wanted to rapidly test and make changes to the code without rebooting my system again and again to try booting. The obvious solution is to use a Virtualization tool like VMWare or xVM VirtualBox by Sun (the latter is free), but the trouble is that neither of them support booting from pen-drives and I have long forgotten the existence of floppy drives, and have thus no way of directly writing to a disk and virtual booting straight-away, without creating an new image of the disk each time I make changes to it. So I decided to write to my USB pen-drive directly and try booting from it. It works when I boot the entire computer with it, but VMWare and VirtualBox do not have the option of booting from a USB device.
So messing around xVM VirtualBox 2.0.2 36488 for Windows yesterday, I was pretty surprised to find my USB Pen-Drive listed under the field of Floppies! That is,
a) Create a new Virtual "Machine"
b) Click on the "Floppy" link in the main screen (right panel)
c) Enable "Mount Floppy Drive", and from the drop-down list in "Host Floppy Device", select your USB drive's Drive Letter (haven't tried it in Linux, I guess you'll have to select the correct device like /dev/sdxx)
That's it. Try starting the Virtual Machine now.
Its quite wierd, and I'm still wondering why my USB drive gets listed under floppy, but it works for me! Neither VMWare Workstation, nor xVM VirtualBox permit booting directly from the USB otherwise.
Cheers
Shashank
