topic 4-ports SAS Host Adapter, which two ports should be used to create a stack in ONTAP Discussions

4-ports SAS Host Adapter, which two ports should be used to create a stack

netappmagic — Wed, 04 Jun 2025 12:27:46 GMT

I have following adapter, and if I create a stack of disk/shelf (ds224-12), among 4a/4b/4c/4d, which two ports should be used to create the stack and why?

MFG Part Number: NetApp, Inc. 110-00401 rev. B0
Part number: 111-02026+B0

Thanks!

Re: 4-ports SAS Host Adapter, which two ports should be used to create a stack

GidonMarcus — Mon, 17 Jun 2019 15:39:00 GMT

see pages 17-53 on the SAS cabeling guide

https://library.netapp.com/ecm/ecm_get_file/ECMM1280392

Gidi

Re: 4-ports SAS Host Adapter, which two ports should be used to create a stack

TMACMD — Mon, 17 Jun 2019 15:48:15 GMT

If you ONLY have a single 4-port adapter, then you use

4a/4d Stack 1

4b/4c Stack 2

The card has two ASICs on it. One controls ports a/b and the other ports c/d.

This way is one asic fails, the stack does not.

Now, referring to the cable guide if you have more than 4-ports, you should use ports from all sources.

slots 0 and 4 for instance, you would/should do:

0a / 4b

4a / 0d

0c / 4d

4c / 0b