Do I need an additional RAID controller?

Question

Iron

Motherboard ASUS P10S-C / 4L. It has a built-in RAID controller. It is planned to create a RAID1 array of 12 SAS disks. Do I need an additional RAID controller? Does it have to be SAS RAID? Or the RAID controller is SAS RAID?

Answer 1

Of course needed. At least, just to be able to physically connect as many SAS disks.
Without it, there are only 6 x SATA3 6Gb / s ports, 4 of which are on the miniSAS HD connector, but still SATA.
And yes, if you connect SAS disks, then you need a controller with SAS ports.

Answer 2

RAID1 with so many disks is an extremely stupid idea. You will end up with 1/12 of the total volume of disks. For such quantities, you need LVM or ZFS

Answer 3

Of course it must support sas otherwise why did you buy sas disks

Answer 4

The RAID controller in the motherboard does not support SAS, either you buy an optional Asus SAS PIKE controller, or you buy a non-Asus controller. Again, keep in mind that the controller usually has only 4/8 ports for disks, either a backplane with a built-in expander will be needed, or only 4/8 disks can be connected. There is another option with a 16 port controller, but they are quite expensive

Answer 5

Built-in - software, output - needed, not expensive, but quite a hardware one.