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RAID 6 characteristics:
• Groups n disks as one large virtual disk with a capacity of (n-2) disks.
• Redundant information (parity) is alternately stored on all disks.
• The virtual disk remains functional with up to two disk failures. The data is reconstructed from the
surviving disks.
• Better read performance, but slower write performance.
• Increased redundancy for protection of data.
• Two disks per span are required for parity. RAID 6 is more expensive in terms of disk space.
RAID Level 50 (Striping Over RAID 5 Sets)
RAID 50 is striping over more than one span of physical disks. For example, a RAID 5 disk group that is
implemented with three physical disks and then continues on with a disk group of three more physical
disks would be a RAID 50.
It is possible to implement RAID 50 even when the hardware does not directly support it. In this case, you
can implement more than one RAID 5 virtual disks and then convert the RAID 5 disks to dynamic disks.
You can then create a dynamic volume that is spanned across all RAID 5 virtual disks.
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