Administrator Guide
Table Of Contents
- Dell EMC Storage Systems Administrator Guide for the metro node appliance
- Contents
- Preface
- CLI Workspace and User Accounts
- Meta Volumes
- System Management
- Thin support in metro node
- Provisioning Storage
- Volume expansion
- Data migration
- About data migrations
- Migrating thin-capable storage
- About rebuilds
- One-time data migrations
- Batch migrations
- Prerequisites
- Creating a batch migration plan
- Checking a batch migration plan
- Modifying a batch migration file
- Starting a batch migration
- Pausing/resuming a batch migration (optional)
- Canceling a batch migration (optional)
- Monitoring a batch migration’s progress
- Viewing a batch migration’s status
- Committing a batch migration
- Cleaning a batch migration
- Removing batch migration records
- Configure the WAN Network
- Cluster Witness
- Consistency Groups
- Performance and Monitoring
- Metro node with active-passive storage arrays
Volume expansion
This chapter describes how to expand virtual volumes.
Topics:
• Overview
• Volume expansion method
• Expand the virtual volume
Overview
A metro node virtual volume is created on a device or a distributed device, and is presented to a host through a storage view.
For a number of reasons, you may want to expand the capacity of a virtual volume.
If the volume supports expansion, metro node detects the capacity gained by expansion. Then, you determine the available
expansion method: storage-volume. Metro node can also detect the available expansion method.
Not all virtual volumes can be expanded. See Determine volume expansion-method for more details.
Perform volume expansion using a simple, non-disruptive procedure:
1. Expand the storage volume associated with the virtual volume on the underlying storage array.
2. Allow metro node to rediscover the underlying storage array.
3. Expand the virtual volume using the CLI or Unisphere.
Additional documentation
● CLI Guide for the metro node- Run the virtual-volume expand command.
● Online Help for the metro node - Use Unisphere to expand the virtual volume.
● SolVe - See the procedure "Configure storage arrays for metro node".
Volume expansion method
Metro node recommends the best expansion method based on the geometry of the underlying device, using the expansion-
method attribute.
Possible values for the expansion-method attribute are:
● storage-volume — Metro node expands the underlying storage volume (the corresponding LUNs on the back-end
array).
● not supported — Metro node cannot expand the virtual volume because the volume did not meet one or more
prerequisites. See Limitations for details.
You can list the expansion-method attribute using the CLI or Unisphere.
List expansion-method attribute using CLI
In this example, the expansion-method attribute for Test_volume is displayed by listing the virtual-volumes context using
the CLI.
VPlexcli:> ll /clusters/cluster-1/virtual-volumes/ Test_volume
Name Value
------------------- --------------
.
7
Volume expansion 35