I Am looking to upgrade data ontap in the near future from 7.3 to 8.x.
We have two FAS3140 filers, one at Location:A and the other at our D/R site, Location:B - both filers have give away / take back setup within themselves for high availability.
After running through upgrade advisor it states that both locations will fail the MPHA test - I dont think this is true especially as we just added a couple of drawers to one location and performed the give away take back operations and everything worked just fine with no hiccups.
Is this somthing to worry about when performing the upgrade?
The documentation states that you must upgrade your SnapMirror destination before upgrading the source machine to ensure that SnapMirror keeps working.
We have snap mirrors going in both directions, Location:A to Location:B and Location:B to Location:A so this cannot be done.
In this situation, would you perform a give away on the filer at Location:B and a give away on the filer at Location:A and then upgrade the target destination followed by the source filer, and the perform a take back on both systems before performing the same steps on Filer B at both sites?
If this isnt the right way to do it, are we forced to quiesce the mirrors and break them, perform the upgrade and then re-quiesce and snap resume the mirrors?
any advice would be much appreciated.