NonStop S-Series Server Description Manual (G06.24+)

Introduction

HP NonStop S-Series Server Description Manual—520331-003

1-20

Components of I/O Multifunction (IOMF) CRU

The I/O multifunction (IOMF) CRU consists of two boards and a power supply. The two

boards are the multifunction I/O board (which is identical to that shown earlier for the

PMF CRU) and the ServerNet buffer board (SBB).

An approximate representation of the IOMF CRU is shown in Figure 1-11. The IOMF

CRU is the type of CRU that is installed in slots 50 and 55 when the enclosure is

configured as an I/O enclosure, as shown in Figure 1-3.

As mentioned in Components of Processor Multifunction (PMF) CRU on page 1-8, the

MFIOB has six main logic elements: the ServerNet router, the ServerNet bus interface,

and four ServerNet addressable controllers.

The ServerNet buffer board contains logic for sending and receiving ServerNet packets

to and from other enclosures. It provides the necessary ServerNet cable connectors.