HP XP Racks - Manual (Page 48)

As the result of the Virtual LUN operations, a parity group contains FVs, CVs, and free spaces that
are delimited in logical cylinders. Sequential free spaces are combined into a single free space.
The following depicts an example of configuring volumes in a parity group:
Create LDEV function
Use the Create LDEV function to create a customized variable-sized volume. Use Virtual LUN to
create an open-systems volume.
The following depicts an example of creating customized volumes. First you delete FVs to create
free space. Then you can create one or more customized volumes of any size in that free space.
Creating an LDEV
The Storage Administrator (Provisioning) role is required to perform this task.
Use this procedure to create one or more internal or external logical volumes (LDEVs) in a selected
storage system. You can create multiple LDEVs at once, for example, when you are setting up your
storage system. After the storage system is set up, you can add LDEVs as needed.
Before creating an LDEV in a selected storage system, free space may need to be created. Before
volumes are deleted to create free space, remove the LU paths to the open-system volumes. For
instructions on removing LU paths, see
“Deleting LU paths” (page 181) .
You can create LDEVs using any of the following tabs in Remote Web Console:
•
Parity Groups tab when selecting Parity Groups.
You can create multiple LDEVs in the specified free space by setting the necessary items
collectively. If multiple free spaces are in one parity group, the number of free spaces appears
in Total Selected Free Space in the Parity Group Selection section on the Create LDEVs wizard.
Confirm the number of free spaces, and then create the LDEVs accordingly.
For example, if you are creating LDEVs in parity group PG1-1 and it contains two free spaces,
2 appears in Total Selected Free Space. In this case, if you specify 1 in Number of LDEVs per
Free Space, and continue to create the LDEV, two LDEVs are created because one LDEV is
created for each free space.
•
LDEVs tab when selecting any parity group in Parity Groups.
•
LDEVs tab when selecting Logical Devices.
48 Configuring custom-sized provisioning