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Table 5–4: Adding a Memory Channel Interconnect or Rolling from a Dual,
Redundant MC1 Interconnect to MC2 Interconnects (cont.)
Step
Action Refer to:
______________________ Note ______________________
If you set the J3 jumpers for 128 MB because the other interconnect
is MC1, and then later on decide to upgrade to dual, redundant MC2
hardware using 512 MB address space, you will have to reset the
jumpers. If you set the jumpers to 512 MB now, the software will only
allow the use of 128 MB address space for a mixed rail cluster (MC1 on
one rail, MC2 on the other rail).
J4 — Page size: Jumper pins 1 to 3 to select 8 KB
J5 — AlphaServer 8x00 Mode: Jumper pins 1
to 2 for AlphaServer 8200, 8400, GS60, GS60E,
and GS140 systems and jumper pins 2 to 3 for
all other AlphaServer systems
J10 — Fiber Optics Mode Enable: Jumper pins 2 to 3
to enable the use of the fiber optics modules. Jumper
pins 1 to 2 to disable the use of fiber optics
5
If adding a Memory Channel interconnect: Install
the Memory Channel adapter module.
Chapter 5 and
Memory Channel
User’s Guide
If this is the second system in a virtual hub
configuration, connect an MC1 or MC2 link cable
between the MC1 or MC2 modules.
For a standard hub configuration, use a link cable
to connect the adapter to the Memory Channel hub
linecard in the hub slot that corresponds to the existing
Memory Channel linecard in the other hub.
If rolling from a dual, redundant MC1 interconnect
to MC2 interconnects: Remove the MC1 adapter
and install the MC2 adapter:
Virtual Hub:
If this is the first system in a virtual hub configuration,
replace the MC1 adapter with an MC2 adapter.
Figure 5–2 (B)
If this is the second system in a virtual hub configuration,
replace both MC1 adapters with MC2 adapters. Use a
BN39B-10 link cable to connect Memory Channel adapters
between systems to form the first MC2 interconnect.
Figure 5–2 (C)
If this is the second adapter on the first system in a
virtual hub configuration, replace the MC1 adapter
with an MC2 adapter. Connect the second set of of
MC2 adapters with a BN39B-10 link cable to form
the second Memory Channel interconnect.
Figure 5–2 (D)
5–16 Setting Up the Memory Channel Cluster Interconnect