Creating a cross-path 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 cross-path configuration, where the primary site and secondary site servers are connected to both the primary and secondary storage systems. If a failure occurs in one storage system, alternate paths are used by the host to switch I/O to the paired site.

Verify that there is replication between the primary storage system and the secondary storage system using the 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 is onboarded to a primary UCP system and that the secondary storage system is onboarded to a secondary UCP system.
Verify that hostgroups are created on the primary site storage system for the primary site host (pHost) and for the secondary site host (sHost).
Verify that host groups are created on the secondary site virtual storage system (VSM) for the primary site host (pHost) and for the secondary site host (sHost).
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) & secondary site (VSM) for the primary host (pHost) & secondary host (sHost).
- Verify that the P-VOL has been created on the primary site and assigned to the primary & secondary site host groups.
For VSM-to-VSM global-active device creation:
- Verify that the host group has been created on the primary site (VSM) & secondary site (VSM) for the primary host (pHost) & secondary host (sHost).
- Verify that the P-VOL has been created on the primary site and assigned to the primary site host groups created.

Browse to the storage system where you want to create a global-active device pair.
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.
From the GAD configuration list, select Cross Path. Click View GAD configurations > Cross-Path to view a diagram of the cross-path configuration.
Enter the primary resource group.
Enter the primary logical unit (P-VOL). The P-VOL is preselected if you enabled replication of the datastore in the Datastore inventory.
Select the secondary UCP system where the secondary storage system is located.
Enter the secondary resource group.
Select the secondary storage system.
Select the secondary storage pool.
Configure the primary storage and secondary storage host groups:
1. For the primary storage host groups, select one or more preferred paths, if any.
2. Select one or more secondary storage host groups, and then select one or more preferred paths, if any.
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.
For ALUA mode, choose Yes or No to apply the ALUA mode to the logical unit.
Click Submit.
An S-VOL is created on the secondary storage system and a path is created between it and the primary server, and another path is created between it and the secondary server. A global-active device pairing is then created between the P-VOL on the primary storage and the S-VOL on the secondary storage. The paths between them are created, and the preferred path is set as indicated.
After a global-active device replication pair is created, you can view and manage it. See Managing replication pairs.