IBM DS4700 manual

Left ESM	Right ESM
Left ESM	Right ESM

Left ESM Right ESM

Drive	Drive
Channel 1, port 2	Channel 2, port 1

Redundant
Drive Channel
pair	DS4700	Drive
Drive
Channel 1, port 1		Channel 2, port 2

Left ESM	Right ESM
Left ESM	Right ESM

Left ESM Right ESM ds470017

Figure 48. Example of a redundant drive channel pair

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 DS4700 Express is powered down when storage expansion enclosures are connected, as in the case of initial installation). For "hot-case" procedures (in which the DS4700 Express 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.

Chapter 3. Cabling the storage subsystem 69