found some insane deals on Epyc Cpus and boards looking at making a dedicated backup rig with True Nas Core-Scale Depending on which is better supported. ill be using this to back up my current nas as the measly 104tb is filling up fast and its limited in what i can do with it. got a case with 8 bays for hdds.
Parts List for Build
- Epyc 7f52
- Supermicro H12SSL-i
- 32GBx8 PC4-19200R
- NH-U12s-TR4-SP3
- Evga Super Nova 1600 P2
- Cooler Master Cosmos 2 (Modded)
- intel Optane 905p 380gb
- 8x18tb Seagate Exos
from the videos iv seen from Linus and wendels videos you can have multiple nvme ssds act as a cache’s for various parts of the build.
i was looking to make the array as fast as possible and as fault tolerant as possible i know with True Nas ill lose 3 drives 1x for matrix size 2x fault tolerance.
Do note that EPYC requires RDIMM RAM, UDIMM’s won’t work. That’s experience 
I’d also suggest considering adding disk shelves for additional storage capacity. Linus did a video on the subject recently and simple (dumb) disk shelves themselves are fairly cheap on Aliexpress. It’s shipping that makes them expensive As outlined in said video you need some suitable cables and an HBA, but also a power supply for the disks if the shelf doesn’t have one already.
i checked the boards site showed these were compatible as for shelvs not into a homelab scenario. was wondering what can i use nvme ssds to speed up this rig itll be used to incrementally back up the main nas wich is a Synolgy DS1621+ wiht 64gb of Ram 2x2tb 960 Pro ssds for cache and a 10gb duel nic intel x540.
Why this obsession for speed? It’s a backup system! You’re writing to HDD’s, which are slow. If speed really is a concern, switch your storage devices to U.2 or even U.3 drives. Be aware these are expensive (a 15TB U.3 drive (<- link) has a minimum on ebay of aproxx. 1200 USD) and good luck finding options for more then one or 2 drives connecting to a PCIe slot. But they come in large capacity (30TB and more) and are SSD based, so very fast. Micron, Kioxia and Intel are just a few brands to look for if you choose that route.
it’ll expand as time goes on i plan on making sure the drives have the some serious fast cache and tons of ram. plus it’ll be used for other services such as compression.