I have an asus P8P67 motherboard. It has 2 separate controllers with 2 sata 3 connectors each, and a controller with 4 sata 2 connectors. I purchased four identical 1TB sata 3 drives (WD1002FAEX) with the intention of creating a raid 5 array, but didn't realize that the for sata 3 connectors are contained on two separate channels.
Will my read/write speeds be faster, the same, or slower if I move the drives from being individually configured AHCI to striping them with raid 5 on the slower controller? Should I attempt to locate a sata 3 raid controller that has 4 channels, or does it not really matter, as they are platter drives, not SSD. Can a platter drive really burst read/write at 6GB/s?.
[The last raid setup (yes, it was almost a decade ago) that I used was with a Promise SX6000, using six 100GB IDE drives for a raid 5 setup... a far cry from what I have now, but lightning fast at the time. I will be the first to admit that I do not know as much about sata 2 vs. sata 3 as I should.]
I am intending to use this for video editing, so I want to have the highest possible read/write speeds, and wanted the redundancy of raid 5, but will forego it if it appears that I will actually maintain higher speeds using the available sata 3 controllers instead of raid 5 on the sata 2 controller.
Bottom line question: will I gain or lose transfer speed by moving these individually configured sata 3 drives to a sata 2 raid 5 setup?
(I am also aware that I will have to backup and wipe my drives in order to configure them for raid.)