Dell PowerVault MD3420 - Manual (Page 141)

Parameter Description
If the specified virtual disk is an existing repository
virtual disk or an existing snapshot virtual disk, the
command fails.
repositoryVirtualDisk This parameter performs two functions:
• In an existing consistency group that has a
repository virtual disk, this parameter identifies
the repository virtual disk.
• When creating a new repository virtual disk this
parameter identifies either a disk group or disk
pool in which to create the new repository virtual
disk.
capacity The size of a new repository virtual disk in either a
disk group or a disk pool. Size is defined in units of
bytes, KB, MB, GB, or TB.
Notes
You can use any combination of alphanumeric characters, underscore (_), hyphen (-), and pound (#) for
the names. Names can have a maximum of 30 characters.
A consistency group is a collection of base virtual disks that are the source virtual disks for snapshots. You
collect the base virtual disks in a consistency group so that you can perform the same snapshot
operations on each of the base virtual disks. In the context of this command, the term member means a
base virtual disk for snapshot operations. You can manipulate snapshot images associated with members
of a consistency group through batch-style operations, while maintaining consistency across the
snapshot images.
Each member virtual disk must have a corresponding repository virtual disk. You can define the
relationship between the member virtual disk and the repository virtual disk using the
repositoryVirtualDisk parameter. The repositoryVirtualDisk parameter can perform one of
these actions:
• Identify an existing repository virtual disk that is connected to the consistency group.
• Identify either a disk group or a disk pool in which you want to create a new repository virtual disk.
Adding a member to a consistency group with an existing repository has two purposes:
• You can create an entirely new repository virtual disk by running the command without the
repositoryVirtualDisk parameter. When you run the command without the
repositoryVirtualDisk parameter, the command creates a new repository virtual disk in the disk
group or disk pool in which all the other repository volumes are stored. An example of this command
usage is:
set consistencyGroup ["First_Images"] addCGMemberVolume="Data_020212"
• You can reuse an existing repository virtual disk if that repository virtual disk is empty and is not
related to another member virtual disk. You might want to do this if you want to maintain a particular
sequence or relationship for the repository virtual disks. To reuse an existing, empty repository virtual
disk you need to know the name of the repository virtual disk. To determine the name of the
repository virtual disk, use the show allVirtualDisks summary command. All repository virtual
disk names have the form repos_XXXX where XXXX is a unique identifier generated by the MD
storage management software. An example of this command usage is:
set consistencyGroup ["First_Images"] addCGMemberVolume="Data_020212"
repositoryVirtualDisk="repos_0011"
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