Re: Hardware vs. Software Raid Speed

Tejun Heo
2006-08-23T17:48:33Z

Andre Tomt wrote:
> Marc Perkel wrote:
>> Running Linux on an AMD AM2 nVidia chip ser that supports Raid 0
>> striping on the motherboard. Just wondering if hardware raid (SATA2)

SATA2 has nothing to do with hardware RAID.

>> is going to be faster that software raid and why?
>
> Beeing a consumer type board (AM2), the "raid on the motherboard" is in
> 99.999% of the cases just software raid implemented in their Windows
> drivers, a bootup setup screen plus some BIOS magic to get the OS booting.

And, yeah, they're all software RAID. Also, there isn't much to be
gained from making RAID0/1 hardware. The software overhead isn't that
big. For RAID5, having XOR done in hardware helps.

--
tejun