RAID 5 will be faster at writing then RAID 1, and MUCH MUCH faster at reading. Keep in mind RAID 1 is a mirrored set and it a hair slower then a single drive. In RAID 1 you lose half your space, in 5 you lose 1 drives worth outta the array. If you are not interested in data protection as you say, go with RAID 0 (striped set) as its the fastest. Just keep in mind with RAID 0 that if one drive dies ALL the data is lost!!