I had that EXACT question as I stared at different drive enclosures on Black Friday Amazon sales.
Thank you for asking it. I was wondering about Orioco's other product like this one.
>I'm imagining this could be done via some sort of SATA "card" connected to a spare PCI-E port. But when I look on Amazon, there's so little explanation or imagery explaining how they connect to drives.
LEGOS. It's intuitive and simple, stop over thinking it.
Since you have a lot of drives you should be using a drive docking station: https://www.amazon.com/-/es/gp/product/B07MQCDVJ2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Or, you can build yourself a NAS.
DIY - TruNAS / Cases w/hot swap hard drives. Chenbro SR30169T3 SilverStone DS380b
DIY - TruNAS / Cases without hot swap, but you can buy hot swap later. Fractal Design Define 7 XL Cooler Master CM Stacker 810 (or any CM stacker case)
Or, pay someone else to host it on his computer (cloud).
Or, buy an off the shelf solution.
Yeah, it'll work fine. My NAS is a 4gb pi4 that originally used four drives and is now down to two; it hasn't given me problems. I use this dock for my drives. The pi in addition to its NAS duties also runs nextcloud, jellyfin, transmission, and an IRC bouncer without a hitch.
If you have dedicated disk cloning hardware it's worlds faster. See https://www.amazon.com/dp/B07MQCDVJ2
It's this one or something a lot like it. Orico 5 Bay USB 3.0 with duplicator functionality.
Or is there no place that sells just the controller board from something like this?
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