Integrated Dell Remote Access Controller 9 User's Guide

RAID level 60 - striping over RAID 6 sets

RAID 60 is striping over more than one span of physical disks that are configured 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.