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A RAID array can only use one type of partition, right? (eg. FAT32/FAT32, NTFS/NTFS, but not FAT32/NTFS)

There are all different kinds of RAID. That question only makes sense in certain contexts. Why don't you describe what you want to do?

If setup of the array is completely handled by the RAID controller, then you can partition it as you like for the operating system.

Especifically a RAID 0 (striped) array

Will you be setting it up via the RAID controller BIOS, or in the OS (Windows stripe set)?

If you set it up via the RAID controller, you can partition and format it just like any other hard drive. If you set it up in Windows, I believe it needs to be NTFS.

If you plan to dual-boot with a non-Windows OS (Linux, FreeBSD, etc.) I would recommend against using RAID of any kind (especially for your boot drive), unless you get one of the (expensive) intelligent RAID controllers with an onboard processor.

VTNC, please look at it from the answer's point of view. What information might we be seeking? You need to be specific if you want a specific answer. Ask with very general ambiguous terms and you will get a very general ambiguous answer.

Are you doing software RAID? Hardware RAID? Is it a high-end SCSI controller, a medium-end dedicated IDE RAID controller, an on-board IDE RAID controller? This affects whether the BIOS or Windows see the RAID array as one giant disk, or has to assemble the separate disks itself.

To answer your question, no. In most cases that is not true. A RAID array should generally appear like one big disk, which you can put anything on. But if you're doing software RAID that's not the case (see above), and there are other rules.

Moved to the Storage forum.