Compaq ProLiant CL380 New Advanced RAID Level for Today's Larger Storage Capac - Page 5

New Advanced RAID Level for Today's Larger Storage Capacities: 5 Choosing a RAID level Customers should consider a variety of factors when choosing which RAID level best suited for their needs. These factors include: 1. Capacity utilization and budget; 2. Availability and Uptime requirements; and 3. Performance requirements. Tables 2 and 3 help determine which RAID level best suits particular requirements. Table 2. Choosing a RAID method. MOST IMPORTANT SECONDARY IMPORTANCE Cost Effectiveness (cost per usable capacity) Fault Tolerance Performance Fault Tolerance Performance Cost Effectiveness Performance Cost Effectiveness Fault Tolerance RAID LEVEL CHOICE RAID ADG RAID 5 (RAID 0 if fault tolerance is not needed) RAID ADG RAID 0+1 RAID 5 (RAID 0 if fault tolerance is not needed) RAID 0+1 Table 3. RAID Level Decision Tree RAID Level Decision Tree NO Fault YES Tolerance 2 # of 8 or more Disk Drives RAID 0 3-7 Higher performance PPeerrffoorrmmaannccee vvss.. CCaappaacciittyy Higher capacity utilization RAID 1 RAID 0+1 RAID 5 RAID ADG 13JE-1000A-WWEN