Connecting three Expansion shelves to the Primary shelf

Two of the three Expansion shelves connect to the Primary shelf. None of the Expansion shelves connect directly to the compute nodes.

Note:

The orientation of the blue tabs on the ends of the SAS-3 cables is important.

n the appliance, the blue tabs on each SAS-3 connector must face as shown in the diagram.

In the storage shelves, the blue tabs on each SAS-3 connector must face as shown in the diagram:

To connect three Expansion Shelves

Verify that all compute nodes and the Primary Shelf are off and that the power cords are unplugged.
Do not remove the cables between the compute nodes and the Primary shelf.
Obtain the two SAS3 cables that ship with each Expansion Shelf.
Identify the single SAS3 port on the left side of each controller module in the Primary shelf.
Identify ports A and C in each I/O module in the Expansion shelf. Port B is not available for use.
IMPORTANT: Note the correct orientation of the blue tab on the ends of the SAS3 cables. The blue tab must face down in the ports that connect the storage shelves.
For the SAS3 cables in the Primary shelf that connect to the compute nodes the blue tabs must face up.
Connect one cable to each of the SAS3 ports on the left of each controller module on the Primary shelf.
Connect the left cable to port A in the left I/O module on the closest Expansion shelf.
Connect the right cable from the Primary shelf to port A in the right I/O module in the farthest Expansion shelf.
Connect one end of a new cable to port C in the left I/O module of the first Expansion shelf.
Connect the other end of the cable to port A in the left I/O module of the second Expansion shelf.
Connect one end of a new cable to port A in the right I/O module of the first Expansion shelf.
Connect the other end of the cable to port C in the right I/O module of the second Expansion shelf.
Connect one end of another cable to port A on the right I/O module of the first Expansion shelf.
Connect the other end of that cable to port C in the right I/O module of the second Expansion shelf.
Connect one end of another cable to port A on the right I/O module of the second Expansion shelf.
Connect the other end of that cable to port C in the right I/O module of the third Expansion shelf.
Verify the final cable configuration.
Connect the power cords of all devices as described in this section.
Turn on the devices in the proper sequence as described in this section.
See Turning on the hardware and verifying operation.
Add the new disk space as described this section.
See Adding the disk space of an Expansion Storage Shelf from the Access Appliance shell menu.

Connecting three Expansion shelves to the Primary shelf

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