Sgi Ice X M-Cell Rack Assemblies; Figure 4-5 M-Cell Rack Configuration Example (Top View) - Silicon Graphics ICE X User Manual

4: Rack Information

SGI ICE X M-Cell Rack Assemblies

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Specific SGI ICE X system configurations require the use of enhanced "closed-loop" cooling and
the compute rack assemblies are generally referred to as an "M-Cell". A complete M-Cell
assembly consists of four compute racks and two cooling racks, see Figure 4-5 for an example.
The racks are connected together to create a sealed unit to support closed-loop cooling. One
innovative difference in an M-Cell rack system is that it does not exhaust heated air into the
surrounding environment; this means an M-Cell does not add to the heat load of the computer
room. Multiple M-Cells can be interconnected and configured to create very large systems. Most
M-Cell configurations also require the use of a separate cooling distribution rack unit (CDU rack)
not shown in Figure 4-5.
Figure 4-5 M-Cell Rack Configuration Example (Top View)
The smallest M-Cell assembly consists of two compute racks with a cooling rack in between. This
smaller unit is often referred to as a "½-Cell" rack assembly or simply a "half-cell". See Figure 4-7
on page 65 for an example.
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