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HGST Ultrastar He8 Performance: RAID 1+0
RAID 1+0 is a “striped pair of mirrors”. The goal of RAID 1+0 is to double performance and capacity while allowing potentially more fault tolerance than RAID-5. Data is striped (RAID 0) over mirrored sets (RAID 1) of drives for fast redundancy.
RAID 1+0 requires four drives (or 6, 8, etc). With four drives, two mirrors are created of two drives each, and those two mirrors are then striped. This allows one drive from each mirror to fail, but failure of both drives of a mirrored pair fails the RAID.
RAID 1+0 sustained transfer speed
DiskTester run-sequential used to test peak speed of empty volume, freshly erased. Throughput figures are real-world figures through the OS X file system.
Performance is about what might be expected: about the speed of a 2-drive RAID-0 stripe.
High capacity, high-performance fault-tolerant storage for photography and video.
Non-RAID or RAID-0/1/4/5/10.
Capacities up to 84 Terabytes!