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.
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
.
189