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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

Lots of read errors on disk2 (which you should see in the webUI if you look), but SMART looks OK so maybe just a bad connection.

  • Author

I actually don't see any read errors in the UI, where would I see that?

 

Sounds like I might need to start considering replacing that drive.

Errors should be visible on the main page.

 

Although there are no pending sectors errors look like a bad disk, you can confirm by doing an extended SMART test.

  • Author

Ah, found it, yes, it shows 482 errors.  I am playing it safe and just ordered two replacement drives (going to get that 1TB out of there as well).

 

Side question, anyone see any issues with this as a home NAS drive, other than the heat (I realize the REDs are lower power) http://flash.newegg.com/Product/9SIA5AD4NC7705

Side question, anyone see any issues with this as a home NAS drive, other than the heat (I realize the REDs are lower power) http://flash.newegg.com/Product/9SIA5AD4NC7705

 

I'd rather pay a few $'s more and get more than 90 days warranty...

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