raid 0

Yes, modern RAID controllers will work just fine with different kinds of hard drives. You will obviously be limited by the smallest and slowest of the 2 drives.

It depends on the controller if you can make the size smaller than the entire disks. I know for a fact that the Intel Matrix controller built into some motherboards allows you to specify the size of the array and allows you to make multiple arrays on the same pair of drives.

Don
 
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