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Configuration: Disk Groups and Virtual Disks 141
Changing the RAID Level of a Disk Group
Use the Change
RAID Level option to change the RAID level on a selected
disk group. Using this option changes the RAID levels of every virtual disk
that comprises the disk group. Performance might be slightly affected during
the operation. Keep these guidelines in mind when you change the RAID
level of a disk group:
• You cannot cancel this operation after it begins.
• The disk group must be in Optimal status before you can perform this
operation. Your data remains available during this operation.
• If you do not have enough capacity in the disk group to convert to the new
RAID level, an error message appears, and the operation does not
continue. If you have unassigned physical disks, use the
Disk Group
Add Free Capacity (Physical Disks)
option to add additional capacity to
the disk group. Then retry the operation.
To change the RAID level of a disk group:
1
Select the
Logical
tab.
2
Select the disk group.
3
Select
Disk Group
Change
RAID Level
.
4
Select the RAID level (RAID Level 0, RAID Level 1, RAID Level 5, or
RAID Level 6). The currently selected option is designated with a dot.
5
Click
Yes
.
The RAID level operation begins.
Storage Partitioning
A storage partition is a logical entity consisting of one or more virtual disks
that can be accessed by a single host or shared among hosts that are part of a
host group. The first time you map a virtual disk to a specific host or host
group, a storage partition is created. Subsequent virtual disk mappings to that
host or host group do not create another storage partition.
One storage partition is sufficient if:
• Only one attached host accesses all of the virtual disks in the storage array.
• All attached hosts share access to all of the virtual disks in the storage array.
book.book Page 141 Thursday, December 9, 2010 3:20 PM