(6.8.3) Unraid randomly slows down really badly


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I have an unraid box which will randomly slow to a crawl (SMB transfers time out, webgui mostly unresponsive, dockers unreachable/time out, can't even start HTOP till system returns), top reports high load averages but low CPU usage during these times

 

Hardware

  • Intel i7-6700
  • 12 GB DDR4
  •  4x1tb internal drives (2 toshiba, 2 WD)
  • 1x 1.5tb seagate expansion 2.5 as a parity (connected via USB 3.0)
  • 1x onboard nic
  • 1x TP link gigabit PCIe NIC
  • HP x705w USB (boot)

 

 

Recent Hardware changes

  • Changed from Ryzen 3 - 1200 to intel i7-6700
  • added an external drive to use as parity drive and use parity drive as data drive
  • added second NIC (TP-Link gigabit)
  • removed graphics card

 

I have tried turning on write caching for the parity drive, it has not made much of a difference (yet, I only did this 10 minutes ago at time of writing)

 

Reddit thread

docker ps, no VMs

DMESG

Thanks

Edited by danielandastro
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7 minutes ago, trurl said:

USB connections are not reliable enough for disks in the parity array

If this is the reason then I am completely screwed, I don't have any more SATA ports, and since its a 1.5 TB I assume I have to replace it with the same size drive which rules out restoring the old config. Strange that it would show up now and not after adding the drive

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43 minutes ago, danielandastro said:

will it work if I just shuck the drive

Maybe but you should check parity in that case to make sure.

 

46 minutes ago, danielandastro said:

Is there any way of confirming that the problem was infact the USB

Maybe something would show up in diagnostics. In any case USB parity disk is just a problem waiting to happen in my opinion whether it is the cause or not.

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