About the dissimilar disk restore process

In a standard restore, BMR uses the current client configuration to recreate the original system. Little or no intervention is required because the original system is moved onto the original disk configuration.

In a dissimilar disk restore, intervention is required because you have to map the volume configuration from the protected client to the new disks. (Disk refers to a physical disk, and volume refers to a logical division of disk space on one or more physical disks.)

Mapping occurs as follows:

You should use dissimilar disk restore in the following circumstances:

Warning:

Changes in disk locations may prevent a clustered resource from going online after a restore. BMR does not attempt to adjust clustered resource attributes to account for a dissimilar disk restore.