Memory upgrade for Synology DS2419+
As mentioned in memorystock.com, Synology DS2419+ can use Dual Rank Memory (16GB DDR4 PC4-19200 2400MHz SODIMM NON-ECC Unbuffered 260pin 1.2V CL15 Dual Rank MemoryStock Part# 977ms-977). But my last upgrade failed using Dual Rank memory, only Single Rank works.
Some people mentioned that Synology NAS can use 32GB RAM, but some people said it will cause data corruption if exceed max supported memory. I just upgraded my DS1812+ more than officially supported memory size, hope it will be ok.
References
Synology 64GB DDR4 Unofficial Memory Upgrade Test for DiskStation NAS
Synology NAS Unofficial Memory Upgrade Guide
Memory Upgrade for Synology DiskStation DS2419+ Computer