(possibly 3 if I can make the A/E keyed M.2 slot work for a smaller boot disk - vSphere's deprecation of USB boot disks really bites).
It's a tiny bit wasteful in terms of drive space, but you can just use the first drive. ESXi will partition a chunk of it as a boot drive and the rest will be made into a data store. I'm not sure what the size it allocates to the boot partition, it's much more than is needed, but on a 2TB NVMe I think I had 1.6TB left to use as data store.
On the other hand if you do manage to find a A/E keyed drive please do let me know!
- Is it safe to use the Dual Slim Tip Adapter (
Lenovo Dual Slim-tip Adapter) with a 230W powerbrick with these configurations? Or are there aftermarket PSU's that have multiple output?
Can't answer the second half - not seen one - but on the first the splitter is actually mentioned in the original post. You will get a 135W feed and a 65W (plus a bit of headroom, probably).
- Is vSAN a good option for shared storage when you'll only be able to have 1 cache and 1 capacity disk per node, or are there better options?
I've considered this in some depth, because there are functionality benefits to using vSphere with vSAN plus there is learning to gain and that's part of the point of a home lab; but it is quite complicated and quite heavy, and really benefits from you having more NICs and/or 10GbE which are hard to achieve in TMM nodes - so I for now I come down on the side of "no." I may change my mind in the future!
The best answer will depend on how you intend to use your environment, but I use NFS (from a HPE Microserver 10+) for general storage and then Longhorn for k8s, using local SSDs in three of my nodes.
- I've seen a few people with 3D-printed vertical stands for the TMM nodes; has anyone come across STL files that are suitable for 2 or more P340's?
No because I don't have a 3d printer and thus have not researched it, but the Lenovo vertical stand is super cheap and works well, the main minus being you can't clump your nodes as closely together.