We currently have 3 FAS 3140 filers all running 7.3.2, a clustered pair in our external Datacentre (NAP01 / NAP02) and a standalone filer (NAP03) in the DC at our office, they are run active / active with 10Gig connectivity between DC's.
We want to completely wipe the clustered filers at the external DC and at the same time upgrade the firmware / software and join to our new domain, currently they run a number of volumes that contain CIFS / NFS shares, these are snapmirrored to the standalone filer.
Whilst these are being rebuilt i need to stop the snapmirror and make the volumes on the standalone filer active, once rebuilt we can then look at creating new snapmirror relationships to get them back to the clustered filers.
We have inherited these from a take over so i don't have much experience on Netapps and picking it up as i go, I tried on a test LUN but ended up with in a bit of a mess and the snapmirror said broken-off and i cant do anything with it, i cant risk doing that on the live data!!
Can someone please give me the steps needed to fail this over without data loss