You will lose persistent port If you lose one node, you lose one fabric. If you lose one fabric, you'll lose the performance of one node. If you lose a single SFP or get into issue with a single port on FC switch or 3PAR it will impact an entire fabric. It will limit troubleshooting as you have multiple components as your only path in a fabric.
The FC HBA is an expensive 4port FC HBA, but in your entire storage environment it is a very small part of the total cost. Not really where I would start if I were to save money.
An to be honest, you are probably better off with a single fabric with 2 connections, but it isn't a good option either.
_________________ The views and opinions expressed are my own and do not necessarily reflect those of my current or previous employers.
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