On Sun, 27 Sep 2015, Carlos E. R. wrote:
Really sweet. Fake raid. But of course, that was my point, buster, but the card is hardware and it has a 'hardware BIOS' it's just that the RAID itself is not hardware. That's why I called it that, and you knew perfectly what I meant.
Well, you see, we call them fake raid because the processing runs in the CPU. The heavy work is done by the main CPU, /wasting/ cycles, that could be used for something else. In software. On a (real) hardware raid, the entire processing is done by its chipset, in hardware.
It is not simply "a driver" :-)
That is pretty much irrelevant. Software Linux RAID does the same and I don't think there is really a great performance penalty. The issue is with these cards that (a) it requires a driver for the OS to even see the RAID as a RAID and (b) that it requires a driver to pretty much do anything. The advantage is a BIOS screen but unfortunately that doesn't mean much (unless you can still use it to rebuild arrays, but even then)... This dependency on a driver (that may be faulty, or whatever) might even mean you cannot setup the raid before the OS is installed. Which is rather, just troublesome. So really, it is the dependency issue and the fact that the drives do not appear to the OS as a single logical thing, that is the problem. kk -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org