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When to copy volumes

You might find copying volumes useful under certain situations.

The following table describes some situations where you might find copying volumes useful.
Situation Reasons for copying one volume to another
You want to migrate data from one storage system to another. The destination storage system has more storage or is a model that supports newer technology.
You want to move a volume from one set of disks to another on the same storage system. You want to
  • Split a volume
  • Expand storage
Examples: You can copy a volume vol0 to another volume vol1 and then delete duplicate files and directories in these volumes so that the original contents of vol0 are split into two volumes.

You have six 1 TB disks for vol0 and four 2 TB spare disks. You can migrate vol0 to the four 2 TB disks and replace all the 1 TB disks with larger capacity disks.

You want to copy data from one storage system to another regularly to ensure high data availability. After you copy the data, clients can switch to the destination storage system in the following scenarios:
  • When you shut down the storage system for software or hardware upgrades, or when the storage system is not available for reasons such as natural disasters, you can put the destination volume online to continue file service.
  • If a network client process accidentally deletes a large number of files on the storage system, clients can continue to have access to the files on the destination storage system while you are restoring the files to the source system.
Note: This scenario is also a good application for SnapMirror.