So I'm wanting to build a NAS in the 15-20TB range. I'm hoping to use RAID 5, but I do a lot of video editing so I want to write speeds to be decent, (at least 100MBps). Does anyone have any recommendations for RAID cards that would be able to acheive this? Do things like the number of drives and how good the CPU is influence how fast writes are?
Also, how important would it be to use NAS hard drives? Or could I save some money something cheaper?