Volumes are the underlying management unit of the Storage Manager. Files are split up into different volumes due to their longevity and type.
The capacity limit for a volume when using ISO 9660 CDs is approx. 630 MB, or about 4 GB when using DVDs.
This limit also applies for HD volumes for enabling subsequent changing of the volume type and to be able to burn or write volumes previously opened as an HD as a CD/DVD.
Volumes pass through different states here. If a volume has reached its specified capacity of approx. 630 MB or 4 GB, for example, it is closed. If it is a CD/DVD volume, it is prepared for burning and then burned. The respective volume states are represented by symbols in the Storage Manager Explorer:
Fig.: List of volumes in write cache of the Storage Manager