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OWC Mercury Elite Pro Dual: Performance with 36TB RAID-0
Related: git, hard drive, Other World Computing, OWC Mercury Elite Pro, RAID, RAID-0, SoftRAID, source code and versioning software, SSD, storage, Thunderbolt, USB, USB-C
Sustained performance over 36TB capacity: hardware RAID-0 vs SoftRAID RAID-0
For over 12 years, DiskTester has been the best means available to ascertain how a drive performs across its capacity. When working with RAID, graphing each hard drive individually can reveal performance irregularities that can cause hiccups in RAID performance when multiple drives are used—problem drives can be swapped out for better ones.
The two Western Digital 18TB hard drives are nearly perfectly matched, as demonstrated—perfect for RAID-0.
This test evaluates the hardware RAID-0 performance to SoftRAID over the 36TB capacity.
The overall performance is fantastic for a dual hard-drive RAID-0. RAID-0 performance averages 442MB/sec for writes and 446 MB/sec for reads, identical for hardware RAID-0 vs SoftRAID, on average. That’s an average over the entire 36TB of capacity.
Average Write speed, hardware RAID-0: 442 MB/sec
Average Read speed, hardware RAID-0: 446 MB/sec
Average Write speed, SoftRAID RAID-0: 442 MB/sec
Average Read speed, SoftRAID RAID-0: 446 MB/sec
Those looking to keep performance high might choose to limit capacity usage to the first 80% or so of the capacity, which would guarantee a minimum performance of 360 MB/sec.
NOTE: the spike to peak performance at the very end has to do with file system mapping of blocks (it is not really at the end of the capacity). This file system behavior cannot be controlled. Visualize it inserted at the beginning (at left).