We have Netapp FAS3210, with software version 8.0.2 P4 7-mode.
It is connected to 4 disk shelves: 1 x DS4243 with IOM3 modules and 3 x DS14 MK4 FC with ESH4 modules.
We also have disk shelves that were connected to NetApp 2020 and NetApp 2050 that we recently retired: 1 x DS14 MK2 FC with ESH2 modules and 3 x DS14 MK2 AT with AT-FCX modules.
Is it possible to connect all 8 disk shelves to FAS3210?
I know that DS14-Mk2-AT and DS14-Mk4-FC disk shelves cannot be mixed in the same loop.
...But what are my options; do we use 2 or maybe 3 loops?
Is this setup officially supported and will there be a performance decrease?
Are there some other limitations (number of disks, protocols, number of disk shelfs…)?
I suppose that software upgrade will be necessary. Do I first upgrade software and then connect DS14 MK2 FC / DS14 MK2 AT shelfs, or is it the other way around?
Sorry in advance if I ask stupid questions or made some wrong assumptions but I don’t have almost no experience with NetApp since my primary focus were entry and midrange HP and IBM storage systems.
I would greatly appreciate your answers or at least links to public documents that describe this kind of upgrade / expansion!