Users Guide

Table Of Contents
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.
RAID 50 characteristics:
Groups n*s disks as one large virtual disk with a capacity of s*(n-1) 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 5 span.
Better read performance, but slower write performance.
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 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.
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Managing storage devices