Use the information in this topic to identify the device adapter pair IDs.
A device adapter pair ID identifies the two device adapter cards in the I/O enclosures that work together to provide redundancy for the FC-AL loop that connects to one or more storage enclosures.
The storage enclosures work in pairs, one enclosure at the front of the storage facility, and the corresponding enclosure, at the rear. The front and rear storage enclosures use the same device adapter pair ID. Therefore, in the following figure, only the rear view of the rack is shown.
Figure 1. Device
adapter pair IDs for storage enclosures 