I had naively assumed that I should install Ubuntu to a RAID 5 array to give our in house dev server the best chance of having 100% up time. I have since learned that RAID 5 might be a bad choice for Dev (due to the cost of writes) and that putting the OS and filesystem on the same RAID is not necessarily a good idea (I thought it was a necessity and if the OS was lost, so was the array).
We have 3 1TB drives. Would it be smartest to partition 100 gig of each for the boot sector, RAID1 two of those together (so the OS is RAID'd), then RAID 5 the remaining 900 Gigs per drive into a RAID 5 (effective storage of 1.8TB)? Or is a RAID 5 setup such a bad idea that I should just RAID1 two of the 1TB drives together (effective storage: 1TB) and sit on the third drive?
We are looking to run virtualization on the server (its got 4 gigs of ram and a core duo 2.93 Ghz processor, am I in trouble there?).
Thanks for any ideas or links.