Besides of creating Rescue Bootable Disk for System/Boot volume, it is also recommended to save Rescue File for all the volumes you have encrypted.
When the process of initial encryption of disk volume finishes, the program displays message box suggesting the user should save rescue information for just encrypted volume. If the user agrees, the program proceeds with saving rescue data. If system or boot volume has been encrypted, Save Rescue Data dialog window will appear, otherwise the program will ask the user to browse location where Rescue File should be saved. Information inside Rescue File is protected exactly in the same way as on encrypted volume, so there is no risk that someone who does not know the proper password will be able to use the file to access data on encrypted volume.
The Rescue File can be used to recovery decrypt volume if some accidental damage occurs. To run the recovery decryption process select the damaged volume in main window of the program and run Rescue->Decrypt with Rescue File command.
Rescue File contains information about all encrypted volumes, including System and Boot volumes. The file can be used in more complicated accidental cases, for example, if computer hardware is damaged but there is a hope that hard disk with encrypted volumes is still alive.
In this case you can insert the hard disk to another computer, install BestCrypt Volume Encryption on the computer and run Rescue->Rescue Decrypt Volume command. The program will ask you to browse Rescue File for the process. Browse the file you have saved from computer that is damaged now and the program will decrypt the volume.