I have a USB drive on which I want to install Arch Linux (using the installer, not unetbootin or something similar, as I want the drive to be persistent.) The computer from which I want to boot this USB supports booting from a USB floppy, not a normal drive. Is there any way for me to make a USB floppy on another drive and use that to boot the normal USB drive? Thanks.
Plop from previous answer is a great solution.
Is it that your BIOS doesn't support booting from a USB drive? If that is the case read "How To Boot From USB And CDROM Without BIOS Support".
Can't you boot from the cd-rom ? Or bring your own external usb cd-rom (no power-just usb) and boot from a cd.
Some resources you might find useful:
A while back I came across some nice software called Plop (an unlikely name).
In essence it's a boot manager that can be installed to pretty much anything that can boot (usually a CDROM) and will then let you boot off anything else - even USB drives when your system doesn't support it.