HWM1996

Hello I recently build my first diy nas and installed DSM 7.2.1 using latest arc loader. CPU: Intel N100 Memory: Crucial DDR5 16GB CT16G48C40S5 The system always boot fine but may only work smoothly for a short period of time ,sometime hours with the longest being 4 days. Then it would become unresponsive where i cannot access the 5000/5001 port or any of the docker service i am running, it will just keep loading with white screen. But strangely, I can see traffic in my wireguard app installed on my phone connected to WG-easy docker container running with the wireguard spk on my nas. After hard reboot the nas will work fine again. Sometime it may also run into some docker container error which require reboot to restart the container . the funny thing is, it wont soft reboot or shut down once the problem appear, it will stuck in the "system is getting ready" page for more than a hour. Again hard shut down is required. I ran the memory test for 3 times where the first two pass without error but the third time return with "memtest failed err = 1". What is err = 1? I see most people encounter err =4 or 6. Is it confirmed that the memory is faulty even tho it pass the first 2 run? Thanks!