old HDDs ideas

[quantumisation]

i currently have 150gb and 250gb sata-1 HDDs but in my new system im looking for max speed and fault tolerance, so i was thinking about a raid-5 setup. my plan is to get something like 3x 300gb sata-2 drives, then allocate a small 50gb partition to the O.S and the rest to data storage. Just wondering what people think of that setup and where i could fit the old drives in. Ive not bought anything yet and its just an idea but im open to something better

 

[quantumisation]

nah cant do that the old computer is getting given to someone. Its got a 3rd old IDE drive that i dont want so theyre getting that. I might do the raid0 2 new drives and use old drives as storage idea..although 350gb wont be enough so id end up having to buy a 3rd drive anyway. Why cant i do raid 5 without a controller card, looks to me that theres onboard controllers that can perform raid 5?

 

[quantumisation]

thanks i had forgoten about the cpu usage for onboard so yea raid 5 is probably off the table. I thought controller cards werent that expensive but the cheap 1s only seem to do raid 0 and 1. If you implement raid 0 or 1 onboard how cpu intensive is that likely to be roughly? id still like to use raid somehow (maybe a stripe and a mirror)