topic Re: Single chassis FAS3220 - need help for wiring to DS4243 in ONTAP Hardware

Single chassis FAS3220 - need help for wiring to DS4243

JBGood — Wed, 04 Jun 2025 12:31:48 GMT

Dear,

I inherited a FAS3220 that is currently powered off and not wired to three DS4242 disk shelves. I looked at https://library.netapp.com/ecm/ecm_download_file/ECMP1213632 for the wiring but did not find the layout for the hardware I have. I have one controller of the type in section A on page 3 in the document in the URL. That section A shows the wiring for two controllers. Can I set up the FAS3220 with just one controller and the three disk shelves ? Or do I really miss a controller ? If the setup with one controller is OK (I know, no HA here), does anyone have a pointer to a wiring diagram ?

Best regards,

J.B. Good.

Re: Single chassis FAS3220 - need help for wiring to DS4243

SpindleNinja — Tue, 21 May 2019 15:38:53 GMT

You probably want the single chassis HA with 424x shelves. see attached.

Re: Single chassis FAS3220 - need help for wiring to DS4243

JBGood — Wed, 22 May 2019 16:13:47 GMT

SpindleNinja,

Thanks for the answer. My controller does not look like the one in your graphic, it looks like the one here:

I see this type of controller on page 3 top section of https://library.netapp.com/ecm/ecm_download_file/ECMP1213632 but there's a second controller in on that page. Do I need a second controller or can it use just one and daisychain the shelves to each other ?

JB Good.

Re: Single chassis FAS3220 - need help for wiring to DS4243

andris — Wed, 22 May 2019 16:23:30 GMT

Envision your 3 shelves as a stack.

Always connect circles to squares.

One controller SAS port connects to the top of the stack on the A side of the IOMs; one SAS port connects to the bottom of the stack on the B side of the IOMs.

Daisy-chain between the shelves on both the A and B sides.

Re: Single chassis FAS3220 - need help for wiring to DS4243

SpindleNinja — Wed, 22 May 2019 19:25:49 GMT

You can just use the single if you want, The below part is an expantion module to add more expantion cards.

two controllers (HA) is always better than a single controller though.