I would recommend using the mirroring feature for both database and storage pool and them discard the CIFS share.
Never had to do this but it's the way I would feel confident.
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I'd start by backing up the management database.
Then, create a new pool, as NFS for the management DB, then migrate it to the new location.
Unfortunately, setting up mirroring of ELMs is broken right now. I spent a lot of time on with support, and eventually engineering got involved. Mirroring will never finish and while it will leave you in a working state, it never shows as complete and you'll have red flags and error messages.