Hi all.

we have a 2-node cluster with NW6 SP3, we are now going to change the
servers to new ones and move to NW6.5 SP4 at the same time, the FC-attached
shared disks will be the same.

Could we just upgrade one of the old servers, remove the other one and then
let one of the new servers join the cluster, then remove the upgraded
server and let the other new server join the cluster?

Or should we first upgrade the existing servers and then replace them one
by one, or are there any other way to o this?

We prefer to have clean new installations on the new servers, no upgrades.