Unisys NX5820 - Manual (Page 98)

Configuring Channels
5–10 7017 6300–005
Table 5–4. Guidelines for Configuring Channels
Rule Description
Number of
CMFs per CIOM Standard: 4 CMFs per CIOM (CMF 0, 1, 2, 3 per CIOM)
Maximum: Up to a maximum of 16 external CMFs per domain (32 CMFs per system) for
NX5820.
Up to a maximum of 20 external CMFs per domain (40 CMFs per system)for
NX5820 K.
CS-bus
interfaces A minimum of four CS-bus interfaces per CIOM are provided. When using up to 4 CIOMs
with CS-bus connectivity, there are a maximum of 16 CS buses per domain for
NX5820. When using up to 5 CIOMs with CS-bus connectivity, there are a maximum
of 20 CS buses per domain for NX5820 K.
For all models, one additional CS-bus interface is required for each server attached to
the system. As an option, servers can be connected via the PCI thru card. Refer to
optional configurations in this section.
For the first CIOM in each domain, two of the four standard CMF/CS-bus interfaces
(CMF0/4 and CMF1/5) can service channels in the internal channel rack located
within the module assembly, plus additional external channels (up to 8 channels
maximum per CS-bus).
CS-bus interfaces can be connected to an external channel rack via optional package
styles listed in Table 5–1.
Each CS-Bus interface can service up to sixteen channel loads; however, see “Assigning
Channel Loads” earlier in this section. Channel loads should be balanced across
CMFs, CS-busses, and domains.