IBM System Cluster 1350, Installation And Service Manual

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Types of intercabinet cabling
Cabinet placement is partly determined by the cables that run between cabinets.
Both optical and copper cables are involved.
All intercabinet (rack-to-rack) cables and cable harnesses come in varying lengths
up to 25 m (82 ft.). There are no layout restrictions.
Color-coded CAT5E intercabinet Ethernet cables are available for intercabinet
cabling of the cluster components. The color-coded cables operate exactly as the
existing cluster intercabinet Ethernet cables with the added advantage of being able
to group like-devices by a specific color. The cable colors and lengths include:
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Blue - 0.6 m (1.97 ft.), 1.5 m (4.92 ft.), 3 m (9.84 ft.), 10 m (32.8 ft.), 25 m (82 ft.)
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Green - 0.6 m (1.97 ft.), 1.5 m (4.92 ft.), 3 m (9.84 ft.), 10 m (32.8 ft.), 25 m (82 ft.)
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Yellow - 0.6 m (1.97 ft.), 1.5 m (4.92 ft.), 3 m (9.84 ft.), 10 m (32.8 ft.), 25 m (82 ft.)
Note: In some clusters, the FRU intercabinet cables can also be white or gray.
Use the following table for the available lengths for the different cables and cable
harnesses.
Table 1. Available lengths for fibre-based Ethernet and Fibre Channel cables
Length Part number Note
0.208 m (8.19
inches)
19K1250 Fibre channel cable, LC to SC
1 m (3.28 ft.) 39M5696 Fibre channel cable, LC to LC
5 m (16.4 ft.) 39M5697 Fibre channel cable, LC to LC
25 m (82 ft.) 39M5696 Fibre channel cable, LC to LC
Cabinet placement guidelines
Use the following guidelines when placing the cabinets:
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Cabinets can be placed side-by-side in contact with one another. Remember that
to service any PDU in a cabinet, you must remove the side covers. At least 0.762
m (30 inches) of working clearance is required to ensure the safe removal of a
side cover and provide access to the PDU. If the cabinets are placed side-by-side
in contact with each other, leave enough extra space around the cluster so that
you can move the cabinets if a PDU needs service. Cabinet placement must not
exceed floor-loading limits.
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Cabinet placement must allow for access to both the front and back panels. At
least 0.914 m (36 inches) of working clearance is needed to remove or insert a
module into the rack.
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Cables and cable harnesses are custom made to fit the order.
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Make sure that the cabinets are arranged correctly and adjust them if necessary.
See the packing slip and the cabinet labels to verify that all cabinets are in their
correct locations.
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If you have purchased an IBM Rear Door Heat eXchanger, make sure that you
have prepared the installation area with the proper fluid access, fluid
connections, and fluid drainage. See “Preparing a Rear Door Heat eXchanger”
on page 18 for more information.
Attention: Ensure that all rack-mounted units are fastened in the rack frame. Do
not extend or exchange any rack-mounted units when the stabilizer is not installed.
Chapter 2. Cabinet placement and intercabinet cabling
15