Chan Chung Hang Christopher wrote: >> I've read a lot of different reports that suggest at this point in time, >> kernel software raid is in most cases better than controller raid. >> >> > Let me define 'most cases' for you. Linux software raid can perform > better or the same if you are using raid0/raid1/raid1+0 arrays. If you > are using raid5/6 arrays, the most disks are involved, the better > hardware raid (those with sufficient processing power and cache - a long > time ago software raid 5 beat the pants of hardware raid cards based on > Intel i960 chips) will perform. > not if you're doing committed random writes such as a transactional database server... this is where a 'true' hardware raid controller with significant battery backed write cache will blow the doors off your software raid.