DEC 4000 AXP Service Manual page 140

• Four fixed-media storage compartments (each can hold up to 4 half-height
drives or 1 full-height drive).
• A removable-media storage compartment (can hold 2 full-height or up to 4
half-height devices)
• Four fans
• Backplane assembly (includes system backplane: serial control bus,
Futurebus+, and power bus; storage backplane: fixed-media and removable-
media)
• Power subsystem
• Operator control panel
Figure 6–1 provides a block diagram of the system components. The major
system components are:
• System bus (CPUs, memory, and I/O module)
• Serial control bus
• Futurebus+ and associated options
Figure 6–2 provides a diagram of the system backplane.
6–2 System Configuration and Setup