Users Guide
• 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.
RAID level 60 - striping over RAID 6 sets
RAID 60 is striping over more than one span of physical disks that are congured as a RAID 6. For example, a RAID 6 disk group that is
implemented with four physical disks and then continues on with a disk group of four more physical disks would be a RAID 60.
RAID 60 characteristics:
• Groups n*s disks as one large virtual disk with a capacity of s*(n-2) 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 6 span.
• Better read performance, but slower write performance.
• Increased redundancy provides greater data protection than a RAID 50.
• Requires proportionally as much parity information as RAID 6.
• Two disks per span are required for parity. RAID 60 is more expensive in terms of disk space.
RAID level 10 - striped-mirrors
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.
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Understanding RAID concepts