Real optical libraries

A real optical library (see Figure 1) is a storage device containing the following elements:

An input/output station for entering into and removing cartridges from the library
Optical disk drives
A cartridge storage area for holding optical disk cartridges
A cartridge transport mechanism for moving cartridges between the input/output station, slots in the cartridge storage area, and the optical disk drives

Figure 1. Real Optical Library

In real optical libraries, an optical volume in an optical library can be mounted only on an optical disk drive within the same optical library.

Note: For a grouped write request, OAM selects a volume in a library that is included in the target Object or Object Backup storage group. If a volume is in a library that is not included in the targeted Object or Object Backup storage group, the volume is not considered for write requests that are associated with that Object or Object Backup storage group. Any objects already written on the volume can still be read.