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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.
Figure 8. Model B16 Virtual Tape Server Functional Components (front)
Chapter 1. Introduction 11