I'm so sorry for not getting back to you guys sooner, I somehow missed these posts.
Responses in bold.Great configuration. Congratulation!
I have 3 questions to you.
You are using Xeon D-1508 and Xeon D-1518 as your storage nodes.
1) Do you see any benefit from 1518?
Not as purely a storage node. However for me, this node is part of a virtualized cluster and I wanted the added cores to be able to run additional VM's on this node.
2) How do you think, is 1508 powerful enough to handle storage (12x8TB) with ZFS (FreeNAS) + 10Gbit?
Yes, with one caveat. You might be pushing it if you are doing any kind of dedup (I haven't tested this myself).
3) How do you rate 10Gbit speeds on 1508 platform? Are they close to the max?
Yes. The CPU is not a limiting factor.
I have a few 2.5" SSDs in them using ICY Docker EZ-Convert Adapters.My 27u is in!
I have more questions about that case -- have you considered using 2.5" SSDs in any of those trayless slots? I'm trying to decide between the 3U and 4U case; with 4Us, I could devote a bank to SSDs for slog duties or whatever. I couldn't find any information on whether or not this was possible.
Thanks again!