Beyond two enclosures (up to a maximum of six), make sure that you equally distribute the
enclosures among the redundant drive channel pairs (Figure 3-66 and Figure 3-67 on
page 90).
EXP
EXP
EXP
Figure 3-66 DS5020 drive cabling with three EXPs
Chapter 3. IBM System Storage DS4000 and DS5000 hardware
89