Resize LUN protected by Recoverpoint and SRM

This is not a task that I do very often, but when I do, I seem to forget the “gotchas” in this process.  Documentation is not cohesive, so below are my steps to follow.

**If you have RecoverPoint 3.5 SP1 or later and the VNX splitter with a VNX running OE for Block 05.32 or later exist at all copies, you can use Dynamic LUN Resizing instead.  See the Recoverpoint Administrator Guide page 188.**


Technologies Involved:

  • EMC VNX 5500 (Production)
  • EMC NS-120 (DR)
  • VMware Site Recovery Manager (Both sides)
  • VMware vCenter/vSphere 5.5 (Both Sides)
  • EMC Recoverpoint Appliances (HW Version 5, SW Version 4)

High Level:

  1. Disable RP Group, remove replication
  2. Resize Storage LUNs on both sides
  3. Resize Storage VMFS volumes in vCenter
  4. Add Replication back and Enable RP Group
  5. A full sweep will occur and all of the data will most likely be re-replicated.

The more detailed steps may be different in your situation.  For instance, you may have direct attached LUNs to VMs or Physical machines in lieu of VMFS on the LUNs.

Detailed Steps:

  1. Login to the Recoverpoint GUI (Unisphere)
  2. Click Protection > Manage Protection.
  3. Click your Consistency Group (CG) that contains the replicated LUN you want to change.
  4. Click Group Policy tab.
  5. Under External Management, change “Managed By” to Recoverpoint and click Apply.
  6. Back on the main Status tab for your CG, click “Disable Group” at the bottom.
  7. Select the Replication Sets tab and select the replication set that contains the LUN in question.
  8. Click Remove Replication Set and choose yes to confirm.
  9. Now in a new browser window, login to the production VNX GUI (Unisphere).
  10. Resize the LUN in question.
  11. Now in a new browser window, login to your DR SAN (NS-120 in my case) and resize the LUN to the EXACT same size as your Production LUN.
  12. Login to vCenter.
  13. Browse to Hosts and Clusters.
  14. Find and select a host where the LUN is attached and click Configuration, Storage.
  15. Find the LUN in question and right click on it, choose Properties.
  16. Select Increase and follow the wizard of your new volume.
  17. Now head back over to Recoverpoint (you should still be on the Replication Sets tab).
  18. Select Add Replication Set.
  19. Select your Production Volume from the list first and choose “Next Select Copy Volumes”
  20. Select your DR (copy) volume from the list and choose “Next to Review”.
  21. Once you’re finished reviewing, choose Finish.
  22. Choose the Status Tab and click Enable Group.
  23. Head back to the Group Policy tab, and under External Management, change “Managed By” back to SRM.  Click Apply.


If you find a mistake in my steps above, or have any suggestions, please continue the conversation below in the comments section!

More information can be found about Recoverpoint in the Administrator Guide.


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One Response to Resize LUN protected by Recoverpoint and SRM

  1. Nick November 17, 2016 at 6:14 am #

    Thanks very much, very useful and easy to follow guide.

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