Connecting the hardware to one compute node
This section provides cabling information for a Cohesity 5372 Appliance that includes one compute node, one Primary Storage Shelf, and up to three Expansion Storage Shelves.
Each compute node is connected to the Primary Storage Shelf with four SAS-3 cables.
The compute nodes connect to each other with two Ethernet cables.
Expansion Storage Shelves connect to the Primary Shelf and to other Expansion shelves with two SAS-3 cables.
The Primary Shelf has a single SAS-3 port on the left side of each RAID controller I/O module. This port connects to SAS-3 port A in the Expansion I/O modules.
Note:
Warning:
The hardware must be powered on in the expected order. Else, all the storage may not be seen by the appliance.
To connect a compute node to a Primary Shelf
- Obtain four SAS-3 cables for each compute node.
- Identify the SAS-3 ports in slot 3 and slot 7 of the compute node that is closest to the Primary Shelf.
The ports in slot 7 are labeled 3, 2, 1, and 0 from left to right. The ports in slot 3 are labeled 0, 1, 2, and 3 from left to right.
- Identify the four SAS-3 ports in each Primary Shelf controller.
The left-hand controller is labeled A and the right-hand controller is labeled B.
The ports in each controller are labeled 3, 2, 1, and 0 from left to right.
Note:
The colors of the cables in the following diagrams are for demonstration purposes only.
- Connect the cables as follows:
Connect slot 3, Port 0 of the compute node to controller B, Port 1 on the Primary Shelf.
Connect slot 3, Port 1 of the compute node to controller A, Port 1 on the Primary Shelf.
Connect slot 7, Port 0 of the compute node to controller B, Port 0 on the Primary Shelf.
Connect slot 7, Port 1 of the compute node to controller A, Port 0 on the Primary Shelf.
Use the following procedure to connect Expansion Storage Shelves to the Primary Shelf.
If you do not have any Expansion shelves at this time, proceed to the following section to connect power cords to the hardware.
See Connecting the power cords.
To connect Expansion Storage Shelves to a Primary Shelf
- Do the following if you have one Expansion Shelf.
Connect one end of two SAS-3 cables to the SAS-3 port on the left hand side of each RAID controller in the Primary Shelf.
Connect the other end of the SAS-3 cables to port A in each of the I/O modules in the Expansion Shelf.
Note:
The blue tab on the cable must face down in the Expansion Shelf.
- Do the following if you have two Expansion shelves.
Connect one end of the two SAS-3 cables to the SAS-3 port on the left hand side of each RAID controller in the Primary Shelf.
Connect the other end of the SAS-3 cable in RAID controller A to port A in the nearest Expansion Shelf I/O module on the left side of the shelf.
Connect the other end of the SAS-3 cable in RAID controller B to port A in the right-hand I/O module in the lower Expansion Shelf.
Connect port C in I/O module A of the upper Expansion Shelf to port A in I/O module A of the lower Expansion Shelf.
Connect port A in I/O module B of the upper Expansion Shelf to port C in I/O module B of the lower Expansion Shelf.
- Do the following if you have three Expansion shelves.
Connect one end of the two SAS-3 cables to the SAS-3 port on the left hand side of each RAID controller in the Primary Shelf.
Connect the other end of the SAS-3 cable in RAID controller A to port A in the nearest Expansion Shelf I/O module on the left side of the shelf.
Connect the other end of the SAS-3 cable in RAID controller B to port A in the right-hand I/O module in the lowest Expansion Shelf.
Connect port C in I/O module A of the upper Expansion Shelf to port A in I/O module A of the middle Expansion Shelf.
Connect port A in I/O module B of the upper Expansion Shelf to port C in I/O module B of the middle Expansion Shelf.
Connect port C in I/O module A of the middle Expansion Shelf to port A in I/O module A of the lowest Expansion Shelf.
Connect port A in I/O module B of the middle Expansion Shelf to port C in I/O module B of the lowest Expansion Shelf.
