HBA Expansion pt.1

Expanding from 2 to 3 HBAs

The figures below show steps to migrate a cluster from two to three HBAs.

NOTE: Diagrams below are not representative of proper slot location for HBAs.

Cabling Diagrams

fig.1 Cluster with two HBAs and chains of disk shelves

fig.2 Power down and remove all cabling from the first controller. Add and cable together the new chain of disk shelves, then power on shelves.

fig.3 Install new HBA according to the instructions on installing PCI cards, and connect the controller to the second and third chain as shown.

fig.4 Reconnect the two original HBAs as before to the first two chains. Power on the controller and wait for it to regain control of connected storage.

fig.5 Power down and remove all cabling from the second controller.

fig.6 Install new HBA according to the instructions on installing PCI cards, and connect the controller to the second and third chain as shown.

fig.7 Reconnect the two original HBAs as before to the first two chains. Power on the controller and wait for it to regain control of connected storage.

fig.8 Cluster with three HBAs