Appendix B: Selecting the Best RAID Level ● 141Non-redundant Logical Drives (RAID 0)A logical drive with RAID 0 includes two or more disk drives and provides data striping, wheredata is distributed evenly across the disk drives in equal-sized sections. However, RAID 0arrays do not maintain redundant data, so they offer no data protection.Compared to an equal-sized group of independent disks, a RAID 0 array provides improved I/Operfor mance.Drive segment size is limited to the size of the smallest disk drive in the logical drive. Forinstance, a logical drive with two 250 GB disk drives and two 400 GB disk drives can create aRAID 0 drive segment of 250 GB, for a total of 1000 GB for the volume, as shown in this figure.Disk Drive 1Disk Drive 2Disk Drive 3Disk Drive 4250 GB250 GB400 GB400 GBDrive Segment Size (Smallest Disk Drive)Disk Drive 2Disk Drive 3Disk Drive 4Disk Drive 11 5 ... 9972 6 ... 9983 7 ... 9994 8 ... 1000Unused Space = 150 GBDisk Drives in Logical Drive RAID 0 Logical Drive = 1000 GBUnused Space = 150 GB
