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Slow parity check speed @ 2.68MB/s

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Hi All,

 

I'm having an issue where my parity check is only going at 2.68MB/s and I do have it set to correct errors. I've attached a syslog below. Normally I see it going for 20-30MB/s. My parity drive is a 2TB WD Green drive and I'm running a Core i5 Haswell with 8GB of ram running v5.0.5

 

Thanks for the help in advance.

syslog.txt

You had hardly booted the array when something triggered IRQ16 and nobody responded.  That usually indicates a bug somewhere, most likely in one of the drivers associated with that IRQ.  In your case, it was associated with a few USB ports (no big deal unless you are connected to one of these) and to the mvsas module (a big deal!).  So the kernel disabled the IRQ, which normally disables anything using it.  However, it appears that mvsas was able to continue without any apparent issue in some manual or polling mode, but was far slower without its IRQ.  You can see how slow it mounted the drives and replayed transactions.  I would stop the check and reboot, and hopefully it should be fine.  To avoid this happening again, I would check for a firmware update for your SAS card, or possibly a BIOS update for your motherboard.

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