Theoretically, if you have a file that is split on 2 drives it can be read simultaneously from both drives. If you defrag that array, I'd guess that the file is then combined into one contiguous file ...

Western Digital’s My Book Studio Edition II is an external hard drive that uses two drives, pre-configured as a fast RAID 0 (striped) array. Our test unit came with two 500GB WD Green Power drives ...

It seems like only yesterday when we were laughing at 32 bit storage and "gigabytes", "who would ever use that much space?" we asked ourselves? Now we have new forms of digital media such as Blu-ray ...