Operating guidelines by optical device type
This topic provides information on operational guidelines by device type for optical library data servers and CD-ROM, DVD-ROM, and DVD-RAM stand-alone optical drive devices.
Optical library dataservers
- You cannot use the default value, *MOUNTED, for the volume identifier.
- Volumes that are provided in a volume list must all be in the same library device.
- A single save data file may span several volumes in a volume list.
- For High Performance Optical File System (HPOFS) media, any volume used in a volume list becomes unusable by any save or restore operation other than the operation originally processing the volume list.
For example:
- Save command A writes save data fileA to volume volA.
- Save command B writes save data fileB to volume list: volC, volB, volA.
- Restore command A will not be able to restore from fileA on volume volA.
- Restore command B will be able to restore from fileB on the volume list: volC, volB, volA.
CD-ROM and DVD-ROM stand-alone optical drive devices
- CD-ROM and DVD-ROM are read-only devices. The system does not support save commands for these devices.
- Save files cannot span multiple CD-ROM or DVD-ROM media that contain ISO 9660 media format.
- You can specify the default value, *MOUNTED, for the volume identifier. It will process the optical volume currently in the specified stand-alone device.
DVD-RAM stand-alone optical drive devices
- DVD-RAM devices are read and write devices. Save and restore commands are supported for DVD-RAM devices.
- You can specify the default value, *MOUNTED, for the volume identifier. It will process the optical volume currently in the specified stand-alone device.
- Multiple save data files may span several volumes in a specified DVD_RAM volume list.
Software compression and decompression might increase the save and restore times. It uses considerable processing resources which may affect the overall system performance.
Parent topic:
Saving and restoring optical media