I have been having issues since upgrading my system with a new CPU and motherboard a few months ago. Sometimes a parity check would be fine, a few errors fixed, but other times during the check, the system would crash. The system had been working perfectly before the upgrade for at least a year. One of the errors I saw reported after a crash in the syslog was related to bad sata cables, others seemed to point to heat related issues.
I have replaced all the sata cables and replaced the Fractal Node 304 case fans with Noctua PWM fans so I can use the Fan Auto Control plugin, however the problem persists. Fix common problems reports no errors or warnings. My setup is as follows:
Unraid server Plus, version 6.12.1
Motherboard: Gigabyte Technology Co., Ltd. Z590I AORUS ULTRA
CPU: 11th Gen Intel® Core™ i5-11400 @ 2.60GHz
RAM: 32GB, 2 x Corsair CMK32GX4M2Z2400C16, 16 GiB DDR4 @ 2400 MT/s
Parity: WD WDC_WD140EDGZ 14TB
Array: 4 x HGST Ultrastar 8TB, 1 x Seagate Iron Wolf Pro 14tb
Cache: Western Digital 1TB WD Blue SN550
Boot: Lexar
Memtest is in progress, will add results
syslog.zipsmart.zip