One Ds5020 And Two Or More Storage Expansion Enclosures In A Mixed Configuration; Cabling For One Ds5020 And Up To Six Storage Expansion Enclosures - IBM System Storage DS5020 Installation, User's, And Maintenance Manual

Important: Do not cable the storage subsystem and storage expansion enclosures
Figure 43. Cabling for one DS5020 and up to six storage expansion enclosures
One DS5020 and two or more storage expansion enclosures in a
mixed configuration
A mixed configuration is a configuration in which you have more than one type of
storage expansion enclosure. Figure 44 on page 69 shows the cabling topology if
you have three EXP520s and three EXP810s attached to the DS5020. (The
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IBM System Storage DS5020 Storage Subsystem: Installation, User's, and Maintenance Guide
as shown in Figure 43. A storage array with the incorrect storage
topology might appear to be functional, but incorrect cabling can
potentially have unpredictable results.
Port 2, drive channel 1
Port 1, drive channel 1
DS5020
1B 1A
1A 1B
1B 1A
1A 1B
1B 1A
1A
1B 1A
1A 1B
1B 1A
1A
1B 1A
1A
Port 1, drive channel 2
Port 2, drive channel 2
1B
1B
1B