VERITAS NetBackup 5240 Hardware Installation Manual page 103

Adding one or more storage shelves to an operating 4TB appliance that does not have any storage shelves
5
Connect another SAS-3 cable to port B in the top I/O module of the first storage
shelf. Connect the other end of the cable to port A in the top I/O module in the
second storage shelf.
6
Be sure that the blue clip on the connectors in these ports point down.
Connecting three storage shelves to an appliance
103