changing protocol

Marcel_E — Tue, 26 Sep 2023 16:19:06 GMT

We have setup our HPE Nimble using the FC protocol.
Now we need to change the protocol to FC and iSCSI (to workaround a Veeam backup issue).
Is it safe and non-disruptive? The LUNs are all in use and in production.

Re: changing protocol

Satish04 — Sat, 23 Sep 2023 17:04:00 GMT

Hi Marcel_E,

The process of switching an HPE Nimble Storage array from FC (Fibre Channel) to a combination of FC and iSCSI can be complex and disruptive.
Especially when LUNs are in production, this change should be approached carefully.

Here are some guidelines before changing the protocol:

1. Ensure that you have a verified backup of your data before making any changes. It is always important to maintain data integrity.
2. Your HPE Nimble storage environment should be capable of supporting both FC and iSCSI protocols simultaneously.
3. Make sure your network infrastructure, including switches and routers, is configured to handle FC and iSCSI traffic. Zoning your FC switches and setting up iSCSI VLANs are part of this process.
4. Be aware of the implications of this change if you are using replication. Replication between FC and iSCSI can be complex, so plan accordingly.
5. Both FC and iSCSI must be supported by the host bus adapters (HBAs).
6. Make sure both FC and iSCSI paths are properly configured for multipathing.
7. Before making changes to production, perform thorough testing in a controlled environment. By doing this, you will be able to identify potential problems and mitigate them.
8. It may be necessary to have some downtime as part of the change and communicate this to your stakeholders in advance.
9. Contact the HPE Nimble Storage support team and get guidance specific to your environment and configuration.

Hope this helps.

Regards,
Satish

Re: changing protocol

Marcel_E — Sat, 23 Sep 2023 19:05:15 GMT

Thanks for the quick reply!

I already had a feeling that changing the protocol wasn't without some costs so I'm not going to do this.
I'd rather go and reinstall Veeam and restore the configuration. More safe.

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