Users Guide

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.
Figure 3-8. Striping Over Mirrored Disk Groups
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RAID 10 Characteristics:
l Groups n disks as one large virtual disk with a capacity of (n/2) disks, where n is an even integer.
l Mirror images of the data are striped across sets of physical disks. This level provides redundancy through mirroring.
l When a disk fails, the virtual disk is still functional. The data will be read from the surviving mirrored disk.
l Improved read performance and write performance.
l Redundancy for protection of data.
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Related Information:
See the following:
l "Organizing Data Storage for Availability and Performance"
l "Comparing RAID Level and Concatenation Performance"
l "Controller-supported RAID Levels"
l "Number of Physical Disks per Virtual Disk"
l "Maximum Number of Virtual Disks per Controller"
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RAID Level 1-Concatenated (Concatenated mirror)
RAID 1-concatenated is a RAID 1 disk group that spans across more than a single pair of physical disks. This combines the advantages of concatenation with
the redundancy of RAID 1. No striping is involved in this RAID type.
Figure 3-9. RAID 1-Concatenated
NOTE: On the PERC 3/SC, 3/DC, 3/QC, 4/SC, 4/DC, 4e/DC, 4/Di, 4e/Si, 4e/Di, and CERC ATA100/4ch controllers, there are special considerations when
implementing RAID 10 on a disk group that has disks of different sizes. See "Considerations for RAID 10 and 50 on PERC 3/SC, 3/DC, 3/QC, 4/SC, 4/DC,
4e/DC, 4/Di, 4e/Si, 4e/Di, and CERC ATA100/4ch Controllers" for more information.
NOTE: You cannot create a RAID 1-concatenated virtual disk or reconfigure to RAID 1-concatenated with Storage Management. You can only monitor a
RAID 1- concatenated virtual disk with Storage Management.