161RAID 1 Volumes on this unit consist of two disk drives.If you want a mirrored RAID Volume with more than two disk drives, see RAID10 – Mirror / Stripe for details.RAID 5 – Block Striping with Distributed ParityRAID 5 organizes block data and parity data across the disk drives. Generally,RAID level 5 tends to exhibit lower random write performance due to theheavy workload of parity recalculation for each I/O. RAID 5 works well for file,database, application and web servers.The capacity of a RAID 5 Volume equals the smallest disk drive times thenumber of disk drives, minus one. Hence, a RAID 5 Volume with four 100 GBdisk drives will have a capacity of 300 GB. A RAID Volume with two 120 GBdisk drives and one 100 GB disk drive will have a capacity of 200 GB.RAID 5 is generally considered to be the most versatile RAID level.RAID 5 requires a minimum of three disk drives.RAID 10 – Mirror / StripeMirror/Stripe combines both of the RAID 0 and RAID 1 types. RAID 10 canincrease performance by reading and writing data in parallel while protectingdata with duplication. At least four disk drives are needed for RAID 10 to beinstalled. With a four-disk-drive RAID Volume, one drive pair is mirroredtogether then striped over a second drive pair.
