My current system was built around 4/5 years ago, normally running a few dockers, a few plugins, a couple of lightweight VMs. Only hardware changes over the last few years is bigger drives. It usually stays up for months on end.
Just before Xmas I started a few drive upgrades, removing some older small ones that were beginning to show errors and create a little more space. All was well untill the recent upgrade to 6.4.0. Upgrade went fine but I had following issues with a pre-clear via the plugin so removed the plugin which I understand seems to be a known issue. Following this I have been getting system hangs. Can't ping the server resulting in a hard power done. Reboot, let parity complete and then soon after another freeze. This happened a couple of times. I downloaded the diagnostics plugin and that showed the only real issue being a couple of SSD's in my array (but they have been there for a couple of years) and Call Traces (whatever that is?) I then removed most plugins except CA type stuff, backup but it completed the parity check and then hung again.
I rebooted and successfully run a pass+ of memtest (its ECC ram on the approved list for the M/B)
I've now rebooted into safe mode and its running parity again, the last three successive parity checks showed no errors.
My diagnostics is attached fi somebody could offer some advice please.
unraid-diagnostics-20180130-2132.zip