1) The installer will enumerate the working instances for you. You just
have to pick one from the list.
2) Nodes are equivalent after installation. Simply start the SP install
from the node that currently owns the instance.

Signature
Geoff N. Hiten
Senior Database Administrator
Microsoft SQL Server MVP
> 1.I want ti install SP4 on 2 node Active/Active cluster but problem is i
> forgot SQL Server Virtual server name . How to find that.
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>
> Satwinder