iSCSI with Windows - Mark II with TrueNAS

[jcl123]

Ok, this is a continuation of a previous post here: Hardware config and iSCSI with Windows

After some great advice from HoneyBadger and others, this is what I am currently thinking:

16x 4TB 3.5" 7200RPM SAS Seagate ST4000NM0023 - configured as two 8-drive Raid-Z2's striped, should yield about ≈43TB
This is connected in the 16 chassis bays with the expander using one of the motherboard connectors.

The other motherboard connector will have a breakout cable with 4x 400Gig 2.5" 12Gig SAS WD/HGST HUSMM1640ASS204 0B32172
- I was successful upgrading these drives to 12Gig

But, with the new options with TrueNAS, the question is, what is the best use configuration for the SSDs?
Hoping someone with more understanding of the new features has a suggestion.
Or, maybe in my use case I stick with traditional setups.

-JCL

Some other thoughts:
- I could cut down the slots used for HDD's and put in more SSDs, if there is a good reason to do that, but they would run @ 6G

- That might be OK if they are used for different purposes​

- I could even add another HBA and add up to another 8x SSDs @ 12gig, again if there is a good reason to do that

- The reason it is 8x is that is the limit of additional 2.5" SSDs I can physically fit, 12x total including the one's on the other HBA​

- Thinking I might dedicate the whole box to TrueNAS, and then do iSCSI @ 10Gig to another box that has VMs

- This has the added advantage of giving TrueNAS all 128GB of RAM​

- But, then the other box is less focused on storage, just VMs​

- I have a JBOD with a 12Gig expander that can do 10x HDD's and 2x SSDs (more if I added boxes, since the expander is 36 ports)

- Thinking of connecting that to either of the boxes to use as a backup target​