Considerations for Protecting Raw Device Mappings

Consider the following behavior when protecting raw device mappings (RDM):

The application does not support protecting physical compatibility mode raw device mappings (disks of this type are physical devices). The application omits physical compatibility mode raw device mappings from the backup source during the backup process. A solution to this behavior is to install CA ARCserve D2D inside the guest operating system and perform backups in the same manner as you would back up physical disks.
The application supports protecting virtual compatibility mode raw device mappings. However, consider the following limitations:
- In regard to full backups, the application lets you back up complete virtual compatibility mode RDM disks. However, if you do not use data compression, the backup datasets can be the same size as the source disk.
- CA ARCserve Central Host-Based VM Backup restores virtual compatibility mode RDM disks as normal virtual disks. After the recovery process completes, the disk is no longer configured as or behaves as a virtual RDM.
- An alternative approach to backing up virtual compatibility mode RDMs is to install CA ARCserve D2D inside the guest operating system and back up the RDMs in the same manner as you would back up physical machines.