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Overview of steps to connect storage expansion enclosures to a
storage subsystem
To connect storage expansion enclosures to the storage subsystem, perform the
following steps:
Note: The following procedures are for ″cold-case″ procedures (in which the
DS5020 is powered down when storage expansion enclosures are
connected, as in the case of initial installation). For ″hot-case″ procedures (in
which the DS5020 is powered on when storage expansion enclosures are
connected), refer to the IBM System Storage DS4000 Hard Drive and
Storage Expansion Enclosure Installation and Migration Guide.
Drive
Channel 2, port 1
Redundant
Drive Channel
pair
Left ESM
Left ESM
Left ESM
Right ESM
Right ESM
Right ESM
Drive
Drive
Left ESM
Left ESM
Left ESM
Right ESM
Right ESM
Right ESM
DS5020
Channel 2, port 2Channel 1, port 1
Drive
Channel 1, port 2
Figure 35. Example of a redundant drive channel pair
56 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide