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