Figure 8. Model B16 Virtual Tape Server Functional Components (front)

Figure 9 on page 12 shows the functional components of the Model B16 Virtual Tape Server frame, viewable from the rear (shown with rear door removed):

„1… Cartridge storage cells

Are located on the interior side of the front door and on the back wall of the frame.

„2… Rail system

The cartridge accessor is carried through the library on the rail system installed in each frame. The rail system consists of two horizontal rails, one at the top and one at the bottom of the frame.

„3… Power control compartment

Power to all components in the frame is distributed through the power control compartment.

„4… Virtual Tape Server controller

The Virtual Tape Server controller consists of a RISC processor and associated adapter cards.

„5… Disk storage

Disk storage holds the contents of the Tape Volume Cache and is managed by the Virtual Tape Server controller. Two or four disk storage features are installed in a Virtual Tape Server control unit frame.

Chapter 1. Introduction 11

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IBM Magstar 3494 manual „4… Virtual Tape Server controller, „5… Disk storage