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What is a single drive RAID 0 array?

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linux-howto

http://serverfault.com – My understanding of RAID 0 is that the data is split and striped across all of the drives in the array. If there is only one drive in the array, then what is the point of a single drive RAID 0 array and how does it work? From these ceph benchmarks it appears there is a tangible performance difference as compared to JBOD in at least some cases. Despite my best Googling I could not find anything substantial. Thanks! (HowTos)