My current setup consist of 3 x 1.5 tb in raid 5 and 3 x 2 tb in raid 5, I'm out of space so in the near future I'm going to be buying new 3 x 2 tb to for a new raid 5. Three raid 5's is getting out of hand so I'm looking for a way to consolidate all the drives, use ubuntu as os, and not lose redundancy. My first question is ideas on how to achieve this, which setup and configurations.
I'm also out of sata ports, so Ill be buying some sort of pci card to attach drives to. I've been doing a bit of looking around and it seems I can get a SAS card with N number of ports, break the ports out into Nx4 SATA ports. With a SAS card it appears I have the option of using an expander card to break it out into even more SATA ports. Is my understanding correct? If so what is a good but low cost solution to get around 12 SATA ports using a SAS controller and, if needed, an expander bored.
The case has five SFF-8087 ports so I can run directly from the pci card to the case and it will breakout the sata ports for me, am understanding this correctly? And in the future if I need to expand I can just buy another sas card and do the same, although might be a good idea to buy them all now.
Also a bit more on the raid side. Im using this for media streaming, personal web hosting, git server, etc. So I'm wanting to stick with an os that I'm familiar with, Ubuntu, and have the flexibility to just add drives but keep redundancy.