IBM Tape Library Magstar 3494 - Manual (Page 35)

Figure 11 on page 14 shows the functional components of the Model B18 Virtual
Tape Server frame, viewable from the rear (shown with rear door removed):
1
Disk storage
Disk storage holds the contents of the Tape Volume Cache and is managed
by the Virtual Tape Server controller. One to four disk storage features may
be installed in a Model B18 VTS.
2
Virtual Tape Server controller
The Virtual Tape Server controller consists of a RISC processor and
associated adapter cards.
3
Power control compartment
Power to all components in the frame is distributed through the power
control compartment.
Figure 10. Model B18 Virtual Tape Server (front)
Chapter 1. Introduction 13