How Do I Installing Vista To A External Hard Drive?

I already have vista running on my computer, but i would like to have it on my external hard drive, so i can boot off it, can then it doesnt need the internal hard drives.
I have 1TB in the computer, in 2 500GB HD but they are in 1 partition.
I am using 140GB of memory, but i can delete stuff if less is needed.
The external HD is 149GB, currently using NTFS.
Please ask if any more information is needed.

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3 Responses to “How Do I Installing Vista To A External Hard Drive?”

  1. Only if the motherboard and BIOS allow it to be booted through a USB port.
    However the computer will slow down to a crawl as data cannot be transferred fast enough through a USB port than through a SATA or IDE strap.
    Irrespective what you are doing the OS is operating all the time and needs access to all the hardware instantly. That’s why the OS has to be on the C hard drive.
    As for capacity, why is it you need that amount? Most people would take a life time to fill it. If it crashes and dies on you [and that can happen at any time] look at what you are going to lose!

  2. you have to take it out of the exsternal case and put it in your pc then install it pop it back in the case and it should work
    well there might be another way but thats how i got vista on my 200gb exsternal hard drive and now it boots with usb
    may i ask why you need so much hard drive space thats a hell of alot

  3. as sewrobb said any OS must run from the C drive due to latency between the external drive and the processor/BIOS/system bus.
    also if you have an older system it may not boot from anything other than the C drive or the floppy/CD ROM drive.