IBM Magstar 3494 manual Single-Cell Output Facility, Convenience Input¤Output Station Feature

can be con®gured as High-Capacity Input/Output. An SU, or B16, con®gured as High-Capacity I/O can contain 100 (upper half) or 200 (whole wall) cells. A DU con®gured as High-Capacity I/O contains from 50 (six 3590 drives) to 135 (two 3590 drives) and uses all available cells in the wall. Only a single wall can be con®gured at any time (single High-Capacity input/output facility).

Single-Cell Output Facility

If a Convenience Input¤Output Station is not installed and a high-capacity output facility or high-capacity input/output facility is not de®ned, a single cell in the door of the control unit frame is provided for output. The location of the single cell „1… as shown in Figure 14 is de®ned as 2 A 1. If the optional dual gripper feature is installed, the single cell location is 2 A 3. Any empty and unassigned cell can be used for input operations. See ªRemoving an Ejected Cartridge from the Single-Cell Output Facilityº on page 81 for operating instructions.

A 0 6 C 0 0 4 5

Figure 14. Control Unit Frame Cartridge Storage Cells

Convenience Input¤Output Station Feature

If the Convenience Input¤Output Station feature is installed, you can add or remove from ten to 30 cartridges from the library without interrupting the normal operations of the library. See ªUsing the Convenience Input¤Output Station Feature to Insert Cartridgesº on page 78 and ªRemoving Ejected Cartridges from the Convenience Input¤Output Station Featureº on page 82 for the operating instructions for this feature.

Chapter 1. Introduction 17