DataControl creates a 10 MB private RAW partition for storing metadata first time you encrypt a partition on a disk. This metadata is required for all subsequent client operations on the encrypted drives. It should be backed up with the drives themselves whenever back ups are taken. If the metadata partition is inadvertently removed, the encrypted drives will be rendered inaccessible as the data encryption keys will not be found.
DataControl first attempts to create the private partition from unallocated space. If the disk does not have at least 10 MB of unallocated space, it automatically shrinks the data partition to create space for the private RAW partition. On large partitions, this can be a very time consuming operation. If the Virtual Disk does not have 10 MB of unallocated space, we recommend that you use your Hypervisor tools to extend the virtual disk to ensure that DataControl can create the private partition from unallocated space.
Make sure that the disk contains no more than two partitions, excluding the Microsoft Reserved Partition and the DataControl private partition.
DataControl only supports encrypting either two data partitions or encrypting the root drive partition and one data partition. You cannot encrypt the boot drive and multiple data partitions.