NonStop NS-Series Planning Guide (H06.04+)

Modular System Hardware
HP Integrity NonStop NS-Series Planning Guide—529567-005
5-32
IOMF 2 CRU
Each p-switch (for the X or Y fabric) has up to six I/O PICs, with one I/O PIC required
for each IOAM enclosure in the system. Each NonStop S-series I/O enclosure uses
one port and one PIC, so a maximum of 24 NonStop S-series I/O enclosures can be
connected to an Integrity NonStop NS-series system if no IOAM enclosure is installed.
IOMF 2 CRU
The Integrity NonStop NS-series system is compatible with most disks and ServerNet
adapters contained in currently installed NonStop S-series I/O enclosures equipped
with IOMF 2 CRUs. I/O multifunction 2 (IOMF 2) CRUs, each equipped with an MMF
PIC, are required for connecting NonStop S-series I/O enclosures to Integrity NonStop
NS-series systems.
To retain disk drives and adapters currently installed in NonStop S-series system
enclosures, you can convert these enclosures to NonStop S-series I/O enclosure,
replacing the two PMF CRUs in each enclosure with IOMF 2 CRUs. See the
conversion instructions in the Hardware Service and Maintenance Publications
category of the Support and Service Library of NTL. Refer to Support and Service
Library on page C-1. For information on the IOMF 2 CRUs, see the NonStop S-Series
Planning and Configuration Guide.
NonStop S-Series Disk Drives and ServerNet Adapters
Disk drives and ServerNet adapters (except SEB and MSEB CRUs) installed in
NonStop S-series I/O enclosures equipped with IOMF 2 CRUs, as well as devices that
are downstream of the enclosures, are compatible with the Integrity NonStop NS-series
hardware, as long as the NonStop S-series I/O enclosure is properly connected to the
p-switches. For information on the NonStop S-series disk drives and ServerNet
adapters, see the NonStop S-Series Planning and Configuration Guide.
NonStop S-Series I/O Enclosure Group Numbers
Assignment of the group number of each NonStop S-series I/O enclosure depends on
the cable connection to the p-switch PIC by slot and port. For PIC slot and connector
locations, see Processor Switch Group-Module-Slot Numbering on page 5-28.
The cables from the two IOMF 2 CRUs must connect to PICs residing in the same slot
number in both the X and Y p-switch and to the same port number on each PIC. For
example, the preceding illustration shows the cables from the IOMF 2 CRUS in the
NonStop S-series server connected to port 1 of the PICs in slot 4 of the X and Y p-
switch, assigning the group number of 11.
Caution. Do not attempt to use NonStop S-series SEB or MSEB CRUs in NonStop S-series
I/O enclosures connected to Integrity NonStop NS-series systems. System failure will result.