Creating a single-server storage configuration

Unified Compute Platform (UCP) Advisor Administration Guide
Version
4.6.x
Audience
anonymous
Part Number
MK-92UCP119-15
ft:lastEdition
2024-09-24

You can create global-active device pairs in a single-server configuration, where the primary and secondary storage systems connect to the host server at the primary site. If a failure occurs in one storage system, alternate paths are used by the host to switch I/O to the other site.

ALUA mode will be set on the SVOL as per the PVOL’s configuration. If ALUA mode is enabled on the PVOL, then it will be enabled on the SVOL (if it is not selected in the create global-active device pair wizard).
  • Verify that there is replication between the primary storage system and the secondary storage system using Storage Navigator.
    • Verify that there is a physical connection between the primary storage system and the secondary storage system.
    • Verify that the quorum disk is created and available on both the primary storage system and the secondary storage system.
  • Verify that the primary storage system and the secondary storage system are onboarded to a UCP system.
  • For both physical-to-VSM and VSM-to-VSM global-active device creation, verify that the VSM has an identical serial number for both the primary and secondary storage system.
  • For Physical-to-VSM global-active device creation:
    • Verify that the host group has been created on the primary site (physical storage) and on the secondary site (VSM) for the primary site host (pHost).
    • Verify that the P-VOL has been created and assigned to the primary site host groups.
  • For VSM-to-VSM global-active device creation:
    • Verify that the host group has been created on the primary site (VSM) and on the secondary site (VSM) for the primary site host (pHost).
    • Verify that the P-VOL has been created on the primary site and assigned to the primary site host groups created.
  1. Browse to the storage system where you want to create a global-active device pair.
  2. Select either:
    • Datastores: From the Action menu of the datastore (P-VOL) that you want to replicate, select Enable GAD Replication.
    • Replication Pairs: Click Create GAD.
  3. From the GAD configuration list, select Single Server. Click View GAD configuration > Single Server to view a diagram of the single server configuration.
    Image showing a single server configuration for global-active device replication.
  4. Enter the primary resource group.
  5. Enter the primary volume (P-VOL). The P-VOL is preselected if you enabled replication of the datastore in the Datastore inventory.
  6. Select a secondary storage system.
  7. Enter the secondary resource group.
  8. Select a secondary storage pool.
  9. Select one or more host groups on the secondary storage system to connect to the primary server.
  10. For the consistency group, select one of the following options:
    • No consistency group ID: select this option, and then select a Quorum Disk.
    • New: select this option, and then select a Quorum Disk.
    • Existing: select this option to display the consistency group ID.
  11. For ALUA mode, choose Yes or No to apply the ALUA mode to the logical unit.
  12. Click Submit.
    An S-VOL is created on the secondary storage system and presented to the selected hostgroups. A path is created between the S-VOL and the server, and a global-active device pairing is then created between the P-VOL on the primary storage and the S-VOL on the secondary storage.

    After a global-active device replication pair is created, you can view and manage it. See Managing replication pairs.