Refer to the diagrams in this section to upgrade or add to a system with DE2-24 disk shelves by introducing one or more DE3-24 disk shelves. In the following diagrams, the DE2-24 disk shelves have three I/O Module ports, while the DE3-24 disk shelves have four ports. See Cabinet and Cabling Guidelines for disk shelf intermixing guidelines.
In this example, a DE3-24 (right chain, first disk shelf) is added to a single DE2-24 disk shelf chain. Left chain is not changed.
Figure 488 Clustered ZS4-4 controllers with two HBAs connected to one DE3-24 (right chain, first disk shelf) and three DE2-24 in two chains
In this example, a DE3-24 (bottom chain, second disk shelf) is added/replaced to a DE2-24 disk shelf chain in the middle. Remaining two chains above it are not changed.
Figure 489 Clustered ZS4-4 controllers with three HBAs connected to one DE3-24 (bottom chain, second disk shelf) and six DE2-24 in three chains
In this example, a chain of two DE3-24 (right chain, third and fourth disk shelves) is added. Remaining three chains are not changed.
Figure 490 Clustered ZS4-4 controllers with four HBAs connected to two DE3-24 (right chain, third and fourth disk shelves) and six DE2-24 in four chains