I would like to install ubuntu server on a usb drive and then boot from that usb drive. I want to create a software raid 5 array out of the 3 x 2TB hard drives in my computer which I will use for my data. I will use XFS on that raid array.
I will dd my usb key so i can create a clone it the original dies. However, what happens if I want to create a whole new install of Ubuntu server instead, perhaps located on a 4th hard drive instead of on a USB key. Will this new install of Ubuntu be able to use the software raid 5 array and XFS file system that was created by my initial install?
As a secondary and not as important question, if I decided to make my OS openmediavault instead, which is based on debian, will I still be able to use the data on my 3 x 2TB drives?