Can i boot up from original hard drive which is now an external hard drive

[tomdoo1]

Hello,my original hard drive was transferred from inside my laptop and contained now in a caddy for use as an external hard drive.,via USB.
Can i now boot up and have everything working as if hard drive was still internal.or will i have to swop it back?
Thanks in advance

 

[avs262]

If your BIOS sees the USB device you can boot from it. It's going to be slower, but should work just fine.

 

[JustSomeJoe]

If you are booting Windows it rarely works, as soon as Windows loads the drivers for the USB port it'll reset the port and drive attached...

 

[coolvap]

If it is connected via USB 2 interface, it will be really slow. You need to set USB as the first boot device via BIOS for it to work.