I found an answer to your question here
If you have a dedicated RAID controller that plugs into a PCI port,
then you should be fine. All of the RAID data will be stored on the
controller, with matching meta-data on the drives. Then you can just
move the whole thing into another server. Some controllers will even
let you shuffle the drives around so that they don't need to go back
in the same order that they came out in (particularly useful when you
have 14 disks).
If you are using software-based RAID (i.e. in Windows or Linux), then
this too can be transported between machines. With Windows, when you
put all the new disks in, it will ask you to import them and they
should just start running without a hitch. With Linux I don't know the
procedure but I suspect it would be something similar.
If you are using an on-board RAID controller, this is where things can
get tricky. You have specified that you will be moving between
different hardware, so if you were moving from say an Adaptec RAID
controller to a 3Ware controller, then the chances of survival are
minimal. If both the boards have the same brand of controller, they
may be able to read the meta-data off the disks and re-create the
If you're VERY brave, you can create a new array on the new
controller, and make sure that you use the exact same settings as the
previous controller used (same stripe size, etc), and when it asks you
if you want to initialise the array, say no, and hope for the best.
I've had this work with a RAID0 and a RAID10, but never with a RAID5.
So the short answer is - if you want to be able to move it around
easily, invest a hundred bucks into a proper RAID controller and just
move the whole thing over in one hit.