Remove aggregate plexes in one location, move head from this location to another, remove FC-VI cards (you won’t need them for local HA pair), insert head in chassis, cable shelves for local configuration. Basically just it.
To understand well before action. On each FAS3170, the mirrored aggregate contains the root and I just need to remove aggregate plexes in one location without problem on the root volume ? There is no problem with the datas accommodated in pool0 ?
I think, I can extend shelf without stopping the production.