How to make a bootable USB drive out of a bootable DVD or CD
Is there a "universal" way of how you can make a bootable USB drive out of a bootable dvd or cd? What makes a USB drive bootable? What makes a dvd and cd bootable?
For example there is a program called UNetBootin which can make bootable USB drives, but seems like it only works with various linux distributions. (Tried it with a Win7 image and the SystemRescueCD, which didn't work so well...).
Main reason I ask is that I have a Support DVD which came with an Asus EEE, and it of course doesn't have an external dvd drive. So I am curious if I can sort of move that dvd over to a USB drive so that I can use it without buying one.
Not asking just specifically about this one case though, I am curious to know a bit more about this in general. So, if you have a general bootable DVD or CD (Or a DVD or CD image for that matter), could be linux distro, windows install disk, support disks, etc., is it possible to "move" it over to a USB drive and make that work like the DVD or CD did? (Being bootable and all).
See this post for instructions for how to take stuff that's on a bootable DVD and placing it on a USB drive that's bootable.
A USB Thumbdrive is just a hard drive, and if it's got the right boot files and the BIOS supports booting from an external USB hard drive it will work fine.
To understand what makes a CD or DVD drive bootable see this post on the El Torito (CD-ROM standard).
Bart's mkbt utility works well.
There are other tools too, this is a nice link if you are wanting to make it bootable but not windows (only, or neccesarily)
http://www.bootdisk.com/pendrive.htm
Do note though that computers you use this on will have to be set to boot from the USB in a high enough order of precedence to be picked up before the hard drive.
The most "universal" tool I've used is WinSetupFromUSB available here:
http://www.msfn.org/board/topic/120444-how-to-install-windows-from-usb-winsetupfromusb-with-gui/
This tool allows you to create a Windows XP, Windows Vista/7, some Syslinux ISO and some other bootable (even multiboot), including some cool integrated tools from a single GUI (not very pretty), which even allows you to test the bootable USB key in a VM (QEMU) without the need to reboot a machine.
This is my first answer, hope it helped.
Use MultiSystem if you're creating the USB drive from linux. YUMI if you're on windows.
http://www.pendrivelinux.com/multiboot-create-a-multiboot-usb-from-linux/
There is an official Windows USB/DVD Downoad Tool from Microsoft available, which can write a Windows ISO image to a DVD or USB stick.