RecoverPoint: How to resize a LUN that is already replicated by RecoverPoint.

Environment:

Replace with environment details

Description:

How to resize a LUN that is already replicated by RecoverPoint

User wants to expand the size of the LUN that is being replicated


Resolution:

For RecoverPoint 2.4 and earlier:

Important!   Do not remove and re-add LUNs from the RecoverPoint Storage Group on CLARiiON arrays. This may cause the Host ID to change for the LUNs and can result in data inconsistency. Reference EMC Knowledgebase solution 59596 for further information.

Method 1: Data is maintained, the storage sub-system enables resizing LUNs without losing the data

Pre-condition: Production site is active, remote site is not active (distributing).

  1. Increase physical volumes sizes.
  2. Resize volume in the RPA:

    a. Detach the pair from the group.
    b. Delete the pair.
    c. Detach LUNs from local and remote splitters.
    d. Delete LUNs.
    e. Create the LUNs with the new size (perform a rescan in the add paths window).
    f. Create the pair.
    g. Attach the pair to the group.
    h. Attach the LUNs to the splitters.
  3. Volume sweep will start.
  4. Increase size on the production host. For additional information refer to Microsoft Article ID 325590 "How to use Diskpart.exe to extend a data volume in Windows Server 2003, in Windows XP and in Windows 2000".
  5. Flush, tag and pause distribution on this tag.
  6. Disable and enable the device at the remote site in order to invalidate the Windows partition table cache.

Method 2: Data lost, LUN resize entails loss of the data on the LUNs. A procedure that enables restoring data is included. Pre-condition: Production site is active, remote site is not active (distributing).     

  1. Set both sides to active (with the latest storage image at both site).
  2. Increase physical volume size at local site(latest storage image exists now only at the remote site).
  3. Change replication direction (remote to local).
  4. Volume sweep will occur.
  5. Set both sides to active (latest storage image exists at both sites).
  6. Increase physical volume size at remote site (latest storage image exists only at the local site)
  7. Resize volume in RPA system:

    a. Detach the pair from the group.
    b. Delete the pair.
    c. Detach LUNs from local and remote splitters.
    d. Delete LUNs.
    e. At both local and remote sites create the LUNs with the new size and new replicated portion. Perform a rescan in the add paths window prior to selecting the LUNs.
    f. Create the pair.
    g. Attach the pair to the group.
    h. Attach the LUNs to splitters
  8. Perform rescan in disk management in Windows.
  9. Increase size on the production host (local) (reference to external doc might do. For additional information refer to Microsoft Article ID 325590  "How to use Diskpart.exe to extend a data volume in Windows Server 2003, in Windows XP, and in Windows 2000".
  10. Change replication direction local to remote.
  11. Volume sweep will occur.
  12. Flush, tag and pause distribution.
  13. Disable and enable the device at the remote site in order to invalidate the Windows partition table cache.

For RecoverPoint 3.0 and later:Important!   Do not remove and re-add LUNs from the RecoverPoint Storage Group on CLARiiON arrays. This may cause the Host ID to change for the luns and can result in data inconsistency. Reference EMC Knowledgebass solution 59596 for further information.

  1. From RecoverPoint GUI.

    a. Disable CG if CG only include one pair of volume.
    b. Delete the replication sets.
    c. Detach LUNs from local and remote splitters
  2. Increase physical size of LUNs.
  3. Increase size on the production host.

    For additional information refer to Microsoft Article ID 325590 "How to use Diskpart.exe to extend a data volume in Windows Server 2003, in Windows XP, and in Windows 2000".
    Disable and enable the device at the remote site in order to invalidate the Windows partition table cache.
  4. From RecoverPoint GUI.

    a. Create the replication sets with increased size of LUNs.
    b. Attach the LUNs to the splitters.
    c. Enable CG.

  5. Volume sweep will start.
  6. Perform a first time failover to validate the data.

Reference:

EMC Support Solution Number: 8632