RAID Performance

Linux can use the mdadm suite for software raid. Here are the benchmark results from my ARTiGO A2000

It's useful to note these tests clearly show that the CP being at 98% is the limiting factor. This is probably why the stripe set is only a little faster than a single disk



Single Drive on top, Dual Drive RAID0 in italics
         ------Sequential Output------                --Sequential Input-      --Random-
           -Per Chr-    --Block--      -Rewrite-    -Per Chr-    --Block--     --Seeks--
Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
  2G 12257  96  106932   38  49495   26  13139    99 129916  40   266.9   1 (single)
  2G 12501  98  175440  74  52834   48   12980    99 129831  47   137.0   0 (RAID0)

                ------Sequential Create------     --------Random Create--------
         -Create--    --Read---   -Delete--    -Create--     --Read---   -Delete--
files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
  16 19412 100 +++++ +++ +++++ + 19770 100 +++++ +++ 32092  99 (single)
  16 15961   83 +++++ +++ +++++ + 19681 100 +++++ +++ 31786 100 (RAID0)


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