New Advanced RAID Level for Today's Larger Storage Capacities: Advanced Data Guarding

New Advanced RAID Level for Today's Larger Storage Capacities: 5
13JE-1000A-WWEN
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 RAID LEVEL CHOICE
Fault Tolerance RAID ADG
Cost Effectiveness
(cost per usable capacity)
Performance RAID 5
(RAID 0 if fault tolerance is not
needed)
Cost Effectiveness RAID ADG
Fault Tolerance
Performance RAID 0+1
Cost Effectiveness RAID 5
(RAID 0 if fault tolerance is not
needed)
Performance
Fault Tolerance RAID 0+1
Table 3. RAID Level Decision Tree
RAID Level Decision Tree
RAID 0 RAID 1 RAID 0+1 RAID ADGRAID 5
Performance
vs. Capacity
Performance
vs. Capacity
# of
Disk Drives
YESNO
2
Higher
performance
Higher capacity
utilization
8 or more
3-7
Fault
Tolerance