NonStop S-Series Planning and Configuration Guide (G06.29+)

System Components
HP NonStop S-Series Planning and Configuration Guide—523303-021
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I/O Multifunction (IOMF) CRUs
ServerNet Router 1
The 1952 IOMF CRU contains one ServerNet router 1, which has connections to:
•
The backplane
•
The ServerNet bus interface (SBI) on the MFIOB
•
ServerNet adapter slots 51, 52, 53, and 54
•
The serial maintenance bus (SMB), which provides communication between the
SP and the other components within the enclosure
ServerNet Router 2
The 1980 IOMF 2 CRU contains one ServerNet router 2, which has connections to:
•
The backplane
•
The ServerNet bus interface (SBI) on the MFIOB
•
ServerNet adapter slots 51, 52, 53, and 54
•
The serial maintenance bus (SMB), which provides communication between the
SP and the other components within the enclosure
Power Board
The power board in an IOMF CRU supplies power to the components within that IOMF
CRU. In the 1952 IOMF CRU, power supplies reside on the power board; in the 1980
IOMF 2 CRU, the power board receives DC power from the power supplies ion the
power shelf and conditions the power before distributing it to the other components.
The pair of IOMF CRUs within an enclosure also supplies redundant power to the
following devices within that enclosure:
•
Disk drives
•
SCSI terminators
•
ServerNet adapters
ServerNet Buffer Board
The ServerNet buffer board provides the interface between the IOMF CRU and its
associated processors (that is, between the I/O enclosure and its associated processor
enclosure). The ServerNet buffer board is connected to the ServerNet port on the
IOMF CRU faceplate.