Dell iDRAC8 manual RAID Level 50 Striping Over RAID 5 Sets

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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