User's Manual

Understanding RAID Concepts 43
Related Information:
• Organizing Data Storage for Availability and Performance
• Comparing RAID Level and Concatenation Performance
• Controller-supported RAID Levels
• Number of Physical Disks per Virtual Disk
• Maximum Number of Virtual Disks per Controller
RAID Level 5 (Striping with distributed parity)
RAID 5 provides data redundancy by using data striping in combination with
parity information. Rather than dedicating a physical disk to parity, however,
the parity information is striped across all physical disks in the disk group.
Figure 3-4. Striping Disks with Distributed Parity
RAID 5 Characteristics:
• Groups n disks as one large virtual disk with a capacity of ( n -1) disks.
• Redundant information (parity) is alternately stored on all disks.