Duplicating optical volumes

An efficient method to create a backup of an optical volume is to use the Duplicate Optical (DUPOPT) command. This command copies sectors to create a volume that is identical to the source except for the volume identifier and creation date and time.

You can enter the information for the following fields on the Duplicate Optical display:

From volume identifier
To volume identifier
Volume identifier
Clear

Start of change The target media must be at least as large as the source media when the media is duplicated. End of change

If the source media is formatted with *UDF, the DUPOPT command attempts to make more space available on the target media when the target media is larger than the source. The usable size of the target media after the duplication is the smaller of:

The usable size of the target media.
Two times the size of the source media.
Two times the size of the original media where the source volume was first formatted.

For example, when a 1-GB media is duplicated to a 2-GB media, the usable size of the target media after the duplication is 2 GB. When a 1-GB media is duplicated to a 2-GB media, and the 2-GB media is then duplicated to a 4-GB media, the usable size of the final target media after the duplication is 2 GB.