40 Advanced FeaturesNOTE: RAID levels do not represent a hierarchy. A RAID level 5 configuration is notinherently better or worse than a RAID level 0 configuration.The RAID controller on your computer can only create a RAID level 0configuration using two to four physical drives. A RAID level 5 or 10 array(only available with the optional PCI Express RAID controller) must be madeup of three or four drives.All drives must be the same type of drive; SAS and SATA drives cannot bemixed in a RAID array. The drives should also be the same size to ensure thatthe larger drive does not contain unallocated (and therefore unusable) space.NOTE: RAID levels do not represent a hierarchy. A RAID level 10 configuration isnot inherently better or worse than a RAID level 0 configuration.RAID Level 0RAID level 0 uses a storage technique known as "data striping" to provide ahigh data access rate. Data striping is a method of writing consecutivesegments—or stripes—of data sequentially across the physical drives to createa large virtual drive. Data striping allows one of the drives to read data whilethe other drive is searching for and reading the next block.Another advantage of a RAID level 0 configuration is that it utilizes the fullcapacities of the drives. If you have two 120-GB drives installed, you have 240GB on which to store data.hard drive 1segment 1segment 3segment 5hard drive 2segment 2segment 4segment 6SATA RAIDconfigured forRAID level 0
