IBM TotalStorage 3494 Tape Library, Operator'S Manual

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Figure 15 on page 16 shows the rear (without the rear door) of the 3494 B18, B10,
and B20 VTS, with the following functional components:
1
Disk Storage
Disk storage holds the contents of the tape volume cache. The VTS
controller manages the disk storage. A VTS may contain from one to four
disk storage drawers, depending on the model.
2
VTS Controller
The VTS controller consists of a RISC processor and associated adapter
cards.
3
Primary Control Compartments
The primary control compartments distribute power to all components in
the frame. Early 3494 B18 VTSs have only one primary control
compartment.
A06C0275
Figure 14. 3494 B18, B10, and B20 VTS (Front View)
Chapter 1. Introduction
15