Unisys NX5820 - Manual (Page 100)

Configuring Channels
5–12 7017 6300–005
Configuration Diagrams
Figure 5–6 and Figure 5–7 are examples of typical channel configurations. Actual
configurations may vary depending on the number and types of channels configured.
Figure 5–8 shows the typical locations of the PCI thru card when used optionally to
connect a server via the internal channel rack or remote channel rack. The following rules
apply:
•
Reserved channels occupy preassigned channel card slots; however, the locations
assigned to the channels in these examples are typical. The actual card slots occupied
by the MAINTLAN, 802.3, and SCSI–2W cards may vary with the system.
•
All configurations are subject to channel loading considerations; that is, channel
loading is restricted to sixteen channel loads per CMF.
Table 5-5 list the various channel assignments and configurations.
Table 5–5. NX5820 Channel Assignments and Configurations
Name/Use Description
CS-4, CS-5 The internal bus from CMFn to the corresponding row of channel card slots in
the internal rack.
CS-0, CS-1, CS-2, CS-3 The external bus from CMFn to an external channel or server’s PCI bridge
(Windows NT only)
A0 to A9 or B0 to B9 Module card slot locations.
P1, P2, P3 Module card row number.
R1 to R8 The requestor channel number associated with the corresponding card slot in
the internal channel rack. If a channel card occupies more than one card slot,
the requestor channel number assumes the lowest logical number of the card
slots occupied.
MAINTLAN Each domain requires a MAINTLAN channel for access to the Maintenance Hub
for private use. The channel was arbitrarily assigned to card slot A0 (P2 &P3)
or B0 (P2 &P3) for NX5820.
CA322-SCI Each domain requires two dual-initiated SCSI-2W channels. One channel
services the QIC tape and CD-ROM located in the OSS7000 rack. The second
channel serviced two disks also located in the OSS7000 rack. The channels
were arbitrarily assigned to card slots A3 (P3) and B2 (P3) or B3 (P3) and A2
(P3).
CA626-BAS Each domain requires an 802.3 channel card for access to an 802.3 Ethernet
Public LAN and is available for client use. The channel was arbitrarily assigned
to card slots A1 (P2 & P3) or B1 (P2 & P3)
PCI3-FTH Optional connection of a server via PCI thru bridge card. See Figure 5-8 for
optional configurations of the PCI thru card. PCI3-FTH is shipped from the
factory to be used with relative address 3 in channel racks.