The Synology End Game

But self-building a NAS is still a problem, and I'm also talking about this [1] article from the same blog:

There are NO low power NAS boards. I'm talking about something with an ARM CPU, no video, no audio, lots of memory (or SODIMM slot) and 10+ SATA ports.

Sure, anyone can buy a self-powered USB3 hub and add 7 external HDDs to a raspbery, but that level of performance is really really low, not to mention the USB random disconnects. And no, port replicators aren't much better.

[1] https://lowendbox.com/blog/are-you-recyling-old-hardware-for...

Why do you need a bunch of SATA ports? Just get a cheap SAS2 PCIe card on eBay.

There are definitely low power ARM boards with a PCIe lanes. Typically its NVMe, but you can adapt that to 4x PCIe 3.0 which is a lot of bandwidth for HDDs. Not sure why you need a lot of memory for a NAS though, but they do have boards that have 32GB of memory.

What's wrong with this?

https://www.amazon.com/Radxa-5B-Connector-Computer-32GB/dp/B...

And connect a card like this to the NVMe PCIe which you can connect 8 SATA HDDs to with SATA breakout cables.

https://www.ebay.com/itm/155007176276

If you need more than 8 HDDs you can get a SAS2 expander to connect to the SAS2 card and then you could easily connect 24 HDDs with a 6 port SAS2 expander and breakout cables.

Or if you put this small board and card into a server case that has a SAS2 backplane with expander built in, then you can just connect all the disks that way.

Another option, not ARM, but still low power and neat.

https://www.lattepanda.com/lattepanda-sigma

This has Thunderbolt 4 which you can connect to a PCIe slot like this:

https://www.dfrobot.com/product-2832.html

They have a lot of neat stuff, you can get the tiny LattePanda Mu, and dock it in this:

https://www.lattepanda.com/lattepanda-mu

https://www.dfrobot.com/product-2822.html

That SAS/SATA controller would consume more power than all the rest of the system.

A few watts more or less is so far down any sane list of concerns when selecting a NAS solution, I can't believe it's dominating the discussion here.

Depends on what electricity costs in your place. It can be anywhere from 10 ct/kWh to 45 ct/kWh and that makes a huge difference at the end of the month.