The target port group name should only be manually changed after the host has been migrated, or validation checks will fail. You can watch the value of the State field in the user interface change from Created to CutoverReady to Migrating to CutoverSync.Ĩ.) Do Not Change the Name of the Target Port Group Boot LUN NDM migration is supported, but the redirection of boot WWPN must be manually changed.Ħ.) Know the Five Stages of NDM MigrationĪn NDM migration between the source VMAX and the target VMAX3 array is typically completed in five stages:
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The MPIO software must be able to add and remove paths dynamically.Only 16 storage groups can be migrated at the same time this does not include child storage groups.Ī source device cannot be part of a SRDF/STAR environment or an ORS session (including RecoverPoint), and cannot be an R2 however, it can be an R1 as the source of standard SRDF replication. The devices cannot be part of Open Replicator sessions or RecoverPoint devices.ĥ.) Understand a Few Constraints and LimitationsĮach storage group can contain up to 4,096 devices. To provide communication from one array to the other, verify that you have completed all the required zoning and networking between SRDF ports. Although dedicated SRDF ports are recommended, they are not required. This step does not affect the current I/O serviced by these devices, and is not necessary on targets since all devices on the new VMAX3 array are automatically dynamic SRDF capable.Ĥ.) Complete the Pre-Migration Requirementsīefore starting, verify that at least four SRDF ports are present. The source devices must be in a dynamic SRDF capable state. In combination with PowerPath or native MPIO technology, your migration takes place with zero host or application downtime. When you migrate, auto-provisioning mode automatically creates the devices and masking on the target array.
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Verify that the source and target arrays are at their currently-supported code levels.Ĭonsider using auto-provisioning in Unisphere. Implement Dell EMC Solutions Enabler and Dell EMC Unisphere for VMAX 8.3 or higher. Today, Non-Disruptive Migrations (NDM) can leverage VMAX replication technology including new Symmetrix Remote Data Facility (SRDF) settings to migrate seamlessly from a legacy VMAX to a new VMAX3 hybrid or all-flash array (AFA).Īs a storage professional, allow me to share some strategies and tips for successful adoption of these new migration techniques: Storage migrations were complicated, labor-intensive operations that often added overhead, stretched resources beyond capacity, and dragged down host performance. The only ways to complete storage migrations without an outage required extensive work on the host by the server or application administrator. As datacenter applications evolved, maintenance windows became extremely difficult to schedule. In the past, datacenter downtime for systems was well-planned and relatively easy.
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By Phillip Nau, Practice Lead, Storage Technologies, CDIĭo you know the best way to migrate a host from one array to another, with no downtime, and very limited work required at the client side? Discover the benefits and opportunities that await you with the new Non-Disruptive Migration (NDM) technology embedded in the VMAX series of enterprise storage arrays.
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