The physical disks in your provide the physical storage capacity for your data. Before you can store data, you must configure the physical storage capacity
into components, known as and .
The disk group is a set of physical disks that the collects together. The disk group has these characteristics:
The disk group appears as one larger physical disk.
The disk group increases the performance of the storage array.
The disk group lets the RAID controller module write to the multiple physical disks in the disk group at the same time.
The disk group protects your data.
The disk group lets you use technology.
The disk group is created from on your storage array.
The virtual disk is a logical entity that your uses to store data. The disk group can hold one or more virtual disks. You create virtual disks from in the disk group.
Information about Allocating Capacity
Use this information to help you to configure your storage array capacity:
Make sure that some non-configured capacity stays in the form of an . Keep some unconfigured capacity so that you have capacity available for additions or changes to your configuration. You
might need unconfigured capacity for one of these modifications:
Creating one or more
Expanding a
Configuring one or more
You have a limited number of physical disks that you can use to create a disk group. The limit is based on the total number
of physical disks in your configuration. If you use too many unassigned physical disks to create the disk group, the MD Storage
Manager Software might suggest one of these solutions:
Decrease the number of physical disks in the disk group that you are trying to create.
Increase the number of disk groups that you are trying to create.
Mixing different physical disk types within one disk group is not permitted. For example, you cannot mix physical disks and physical disks.
The for your host might have specified limits about how many virtual disks the host can access. Think about these limits when
you create virtual disks for a particular host.