Slow Parity Check 2.5MB/s


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As the title says, my parity check is extremely slow.  I see people complaining about 10MB/s being slow and I am getting less than a quarter of that.  What can I check to figure out why.  Diagnostic information attached.

 

My System:

CPU: Intel® Xeon® CPU E3-1230 v5 @ 3.40GHz

RAM:      16GB DDR4 ECC

MB:        ASRock E3C236D2I Mini-ITX

SATA:    Onboard, M.2, SYBA SY-PEX40039 Plug-in Card SATA III

Cache:    ADATA SSD SP600NS34 256GB

              KingDian SSD S280 240GB

Pool:      3x WD Red 4TB

              1x Seagate ST4000DM000 4TB

              1x Hitachi HDT721010SLA360 1TB

Parity:    Dual (1 WD Red and the Seagate)

aeris-diagnostics-20161004-1045.zip

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