hypothetical raid question

[Nikon]

here is a doozy:

do you think it would be possible to stack raid configurations in the following example:

you have 3 HDDs, 2 250GB and a 500GB

you want to raid-0 the 2 250GB ones into a 500 (i know it shrinks, lets assume its formatted to match the size of the 500GB one) and then raid-1 that with the 500GB one in mirror mode

possible?

[David M]

I know that RAID 1+ 0 or 0+1 is possible. This would mean four drives in that RAID configuration with the fifth and sixth drives being JBOD drives.

In the big picture, a complex RAID system is just asking for problems. RAID itself does sometimes fail. You can buy a dedicated RAID controller which would reduce the chance of problems, but the onboard RAID controllers are not the most dependable things in my experience.

Regardless of what you do with RAID, you still need a truly reliable backup such as an external drive or a cloned drive which is going to add even one more drive to the huge array you would already have.