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Reserved loops
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Memory capacity features
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Physical configuration features and options
IBM supports reuse of 7133 Models 020 and D40 drawers in a 2105 Model 100
expansion enclosure in an IBM Enterprise Storage Server configuration. Support
includes 7133 drawers in new 2105 Model 100 expansion enclosures. This support
provides investment protection for up to 12 of your existing IBM 7133 serial disk
drawers.
IBM service personnel add the Model 100 to the loops you reserved with feature
code 9904. FC 9904 reserves two loops; the limit is four reserved loops. A loop
refers to the wiring that is needed to address the storage. Figure 8 shows reserved
loops.
Loop A
Loop A
DA
8-Pack
8-Pack
Pair 1
Loop B
Loop B
8-Pack
8-Pack
Loop A
Loop A
DA
8-Pack
8-Pack
Pair 2
Loop B
Loop B
8-Pack
8-Pack
Loop A
Loop A
DA
8-Pack
8-Pack
Pair 3
Loop A
Loop A
DA
8-Pack
8-Pack
Pair 4
Figure 8. Reserved loops
See "Feature codes and requirements for attaching 7133 drawers" on page 36 for
the needed requirements in order to attach Model 100 expansion racks.
The ESS Models E10 and E20 have the following memory capacity:
v Standard 6 GB of cache, 3 per cluster
v 384 MB (192 MB per cluster) of nonvolatile storage (NVS)
The ESS Models F10 and F20 have the following memory capacity:
v Standard 8 GB of cache, 4 per cluster with FC 4002. IBM delivers FC 4002 on
the ESS unless you specify the following option:
– 16 GB of cache, FC 4004
v 384 MB (192 MB per cluster) of nonvolatile storage (NVS)
This section includes the feature codes for:
v DDM cages and 8-packs
v physical configuration options
v Storage on demand
Loop A
Loop A
8-Pack
8-Pack
Loop B Reserved by FC9904
Loop A
Loop A
8-Pack
8-Pack
Loop B Reserved by FC9904
Chapter 2. Planning the physical configuration
DA
Pair 1
DA
Pair 2
DA
Pair 3
DA
Pair 4
S008708
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