I currently have a FAS2240-4 that is live and nearly full. I am looking to add a DS4246 for extra storage space. The instructions at this link: https://library.netapp.com/ecm/ecm_download_file/ECMP1149276
show an example with three DS424x systems added on. I am just looking to add one. Looking at the logic for using 3, I am thinking:
Note the two black X's on my diagram. I do not think I need to connect anything to those two Ethernet ports. Does this look correct?
You need to ensure all ACP Ethernet ports are daisy chained from the ACP port on controller 1, the ACP ports on both IOM modules on your new shelf, and then back to the ACP port on controller 2. For a HA-Pair configuration all SAS ports on disk shelves should be used.
Here are the cabled connections you need:
Controller 1 0a --> Shelf 1 IOM A SAS Square
Controller 1 0b --> Shelf 1 IOM B SAS Circle
Controller 2 0b --> Shelf 1 IOM A SAS Circle
Controller 2 0a --> Shelf 1 IOM B SAS Square
Controller 1 0P --> Shelf 1 IOM A ACP Square
Shelf 1 IOM A ACP Circle --> Shelf 1 IOM B ACP Square
Shelf 1 IOM B ACP Circle --> Controller 2 0P
Note 0P ports on the controllers refer to the ACP port indicated with a Lock Spanner Port.