Do SATA data cable splitters exist for situations where you have more SATA storage devices than SATA ports on your mobo?
No (SATA is a point to point protocol).
You'll need a PCIe board with more SATA connections, and you might wind up using SAS connections and buying SAS-SATA adapter cables. One "quick and dirty" method I used for grabbing two more SATA ports on my motherboard was to buy a PCIe NVMe port: using the NVMe port on my motherboard disabled SATA ports 5-6 (this is an AMD 450B motherboard).
This is commonly discussed over on https://www.reddit.com/r/DataHoarder/
Aiight cool, thank you :)
Or you use usb 3 external.
True but not the ideal solution, thank you though :)
If you have spare PCIe slots on the motherboard you could add a PCIe sata controller for yourself.
So think of it as a splitter that splits the PCIe slot into 6 sata ports!
Ooohh I like this idea! Thank you very much!
It's basically a repurposed Define R6 that's going to be a basement media server stuffed with (qty: 8) 10TB HDDs, that all the household family members can access for movies, netflix, photos, etc. It won't have a dedicated GPU but will utilize a CPU with integrated graphics (APU??). Everyone here already has a laptop or PC so this isn't a typical use system. Since most mobos only have 6 SATA ports and the case can hold up to 11 HDDs, I've been trying to figure this out.
It does lack hardware raid but if you use freenas for the server you can still use a software raid on them. With 8 drives I would consider Raid 5 or 6. Though you do not need a home storage server for netflix as that is a streaming service.