Dell SRDF Introduction

Data migration

The data migration capabilities of SRDF enable devices on either side of a two-array configuration to be replaced with new devices without interrupting disaster recovery operations. The configuration is enhanced with a third array that contains the new devices. Data is replicated to the third array in addition to the normal operation. When the migration is complete, the devices being replaced can be taken out of the configuration leaving one of the original arrays and the new one.

For example, this diagram shows the replacement of R2 devices with new devices using SRDF migration facilities:

• The initial two-array topology
• The interim three-array topology
• The final two-array topology

Data migration describes the SRDF migration capabilities and system configurations in more detail.