48 Sun StorageTek 2500 Series Array Hardware Installation Guide • September 2009
Cabling an Expansion Tray to Another Expansion
Tray
Each additional expansion tray is added to the preceding expansion tray by
connecting SAS cables from the Out ports of the first tray to the In ports of the next
tray.
FIGURE 2-19 illustrates a 1x3 storage array configuration consisting of one
controller tray and two expansion trays. The cable connections on the B-side are
reversed (the cable from the controller A expansion port goes to the In port of
expansion tray 1; the cable from the controller B expansion port goes to the In port
on expansion tray 2) for maximum redundancy. This pattern continues for each
additional tray you add. Two more SAS cables are required for each additional tray.
FIGURE 2-19 1x3 Storage Array Configuration Cabling
AB
Controller Tray
Expansion Tray 1
Expansion Tray 2
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