User's Manual

Understanding RAID Concepts 47
Figure 3-6. RAID 50
RAID 50 Characteristics:
• Groups n * s disks as one large virtual disk with a capacity of s *( n -1) disks,
where
s is the number of spans and n is the number of disks within each
span.
• Redundant information (parity) is alternately stored on all disks of each
RAID 5 span.
• Better read performance, but slower write performance.
• Requires as much parity information as standard RAID 5.
• Data is striped across all spans. RAID 50 is more expensive in terms of disk
space.