User's Manual

50 Understanding RAID Concepts
• Two disks per span are required for parity. RAID 60 is more expensive in
terms of disk space.
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 10 (Striping over mirror sets)
The RAB considers RAID Level 10 to be an implementation of RAID level 1.
RAID 10 combines mirrored physical disks (RAID 1) with data striping
(RAID 0). With RAID 10, data is striped across multiple physical disks. The
striped disk group is then mirrored onto another set of physical disks. RAID
10 can be considered a mirror of stripes.