Booting on USB Disk

["JD" <jd@xxxxxxxxxxxxx>]

Hello,

 

I installed a RedHat 8.0 Linux on the primary hard disk of a laptop.

Then I removed this hard disk from the internal slot and I connected it through the USB port.

 

Now I would like to boot from a CD-Rom that then would use the USB Disk as the “system” disk.

 

How is this possible ?

 

Thanks for help,

 

Jerome