42 Planning: MD3200i Series Storage Array Terms and Conceptsis recommended for small databases or other applications that do not requirelarge capacity. RAID 1 provides full data redundancy. For example accounting,payroll, or financial applications.RAID 5RAID 5 uses parity and striping data across all physical disks (distributedparity) to provide high data throughput and data redundancy, especially forsmall random access. This is a versatile RAID level and is suited for multi-userenvironments where typical I/O size is small and there is a high proportion ofread activity such as file, application, database, web, e-mail, news, andintranet servers.RAID 6RAID 6 is similar to RAID 5 but provides an additional parity disk for betterredundancy. This is the most versatile RAID level and is suited for multi-userenvironments where typical I/O size is small and there is a high proportion ofread activity. RAID 6 is recommended when large size physical disks are usedor large number of physical disks are used in a disk group.RAID 10RAID 10, a combination of RAID 1 and RAID 0, uses disk striping acrossmirrored disks. It provides high data throughput and complete dataredundancy. Utilizing an even number of physical disks (four or more) createsa RAID level 10 disk group and/or virtual disk. Because RAID levels 1 and 10use disk mirroring, half of the capacity of the physical disks is utilized formirroring. This leaves the remaining half of the physical disk capacity foractual storage. RAID 10 is automatically used when a RAID level of 1 ischosen with four or more physical disks. RAID 10 works well for medium-sized databases or any environment that requires high performance and faulttolerance and moderate-to-medium capacity.Segment SizeDisk striping enables data to be written across multiple physical disks. Diskstriping enhances performance because striped disks are accessedsimultaneously.
