This section describes defining device numbers for 3995-1xx models.

To define the device numbers for IBM 3995-1xx models, perform the following steps:

1. Use the Add Control Unit panel to define 3995 type control units. Specify the base device number of each 3995-13x model as a control unit. The base device number for the 3995-13x library must be a multiple of 16, meaning the low order digit of this device number must end in zero, for example, 0940 or 0AC0. This is the control unit number that must be used when attaching the channel paths to the 3995 Optical Dataserver. The unit addresses for the 3995 control unit must begin with 00 when attached to ESCON CHPIDs.
2. Use the Add Device panel to define the 3995-13x model. You must supply the base device number; the low order digit of this device number must end in zero, for example 0940 or 0AC0. The number of devices must be 1 and the device type must be a 3995. The control unit number is the same as the base device number. Using 0AC0 as an example, devices 0AC0–0AC7 are generated.
3. Use the Add Device Panel to define the 3995-11x model. You must supply the base device number; the low order digit of this device number must be 8 (the base device number for the controlling library, IBM 3995-13x models + 8), for example, 0948 or 0AC8. The number of devices must be 1 and the device type must be 3995. The control unit number is the same as the base number of the 3995-13x model to which this 3995-11x model is attached. Using 0AC8 as an example, devices 0AC8–0ACF are generated, with 0AC0 as the control unit device number.
   Note: The 3995 does not belong to any esoteric device group and is not reserved through device allocation.