HP 3PAR Online Import for EMC Storage Data Migration Guide

4 Performing the Data Migration
Data migration can be performed by selecting a host or a virtual disk. The sequence of tasks differs
depending on the Operating System of the hosts you are migrating.
CAUTION: You cannot stop a migration once it has started.
Migrating a Windows Host
The minimally disruptive migration (MDM) process is used when migrating a Windows host with
a source EMC Storage system. The host DSM must be updated to communicate with the destination
HP 3PAR StoreServ Storage system, and the host must be shutdown briefly. Host I/O is interrupted
only during the time it takes to reconfigure the host.
Required Information
Source Storage System:
• WWN of source EMC Storage system where LUNs are that are being migrated.
• A list of one or more volume name(s) that are being migrated. All volumes must be in same
Storage Group or different storage groups with identical LUN membership.
OR
• Name of host associated with volumes to be migrated. Host and volumes must be in a supported
storage group configuration on the source EMC Storage system. Refer to “Supported and
Unsupported Migrations by HP 3PAR Online Import Utility for EMC Storage” (page 17) for
details.
Destination Storage System:
• Provisioning type for the volumes being created on the destination storage system (Thin or
Full).
• The friendly name of the CPG on the destination storage system where the volumes are being
migrated to.
32 Performing the Data Migration