I can't say for sure- but, there is a good chance I might have a problem.
The main picture attached to this post, is a pair of dual bifurcation cards, each with a pair of Samsung PM963 1T enterprise NVMes.
It is going into my r730XD. Which... is getting pretty full. This will fill up the last empty PCIe slots.
But, knock on wood, My r730XD supports bifurcation! LOTS of Bifurcation.
As a result, it now has more HDDs, and NVMes then I can count.
What's the problem you ask? Well. That is just one of the many servers I have laying around here, all completely filled with NVMe and SATA SSDs....
Figured I would share. Seeing a bunch of SSDs is always a pretty sight.
And- as of two hours ago, my particular lemmy instance was migrated to these new NVMes completely transparently too.
The two ZFS pools are only 4 devices. One pool is spinning rust, the other is all NVMe.
I don't use raid 5 for large disks, and instead go for raid6/z2. Given z2 and striped mirrors both have 50% overhead with only 4 disks- striped mirrors has the advantage of being much faster, double the IOPs, and faster rebuilds. For these particular pools, performance was more important than overall disk space.
However, before all of these disks were moved from TrueNAS to Unraid- there was a 8x8T Z2 pool, which worked exceptionally well.