Defining 3995 device numbers

OAM uses specific base device numbers for communicating the following with the optical disk library and the optical disk drives within the library:

Each IBM 3995 library configuration is required to have device numbers defined to the MVS operating system and channel subsystem. A library configuration can consist of a controller, a single library, or a single library with an expansion unit. The number of device numbers depends on the hardware configuration.

Attention: Multihost attachment from two separate processors or two separate partitions of the same processor is not supported in a nonOAMplex environment. The multihost logical connection environment of an OAMplex uses only one active host-library connection.

The base device number for the IBM 3995-13x or 3995-C3A controlling library models must be a multiple of 16, meaning the low order digit of the base device number must be zero, for example, 0940.

The base device number for the IBM 3995-11x expansion unit models must be equal to the base device number of the controlling library (the IBM 3995-13x models) + 8, for example, 0948. The base device number for the expansion units (3995-11x models) is automatically calculated and does not need to be specified when defining these libraries.

The base device number for the IBM 3995-Cxx models must match the base device number assigned to the device when it was installed. For further information on defining the 3995-Cxx libraries, see Figure 3.

Use the HCD panels to define the new 3995 device numbers. Defining 3995 device numbers with HCD provides the following capabilities:
Parent topic: 3995 Optical Library Dataserver