I just edited my previous post to make my intention clearer.
And yes you may need to do a little tweaking to initially migrate your data from your old Redmine appliance. Personally I'd do that with a backup (as discussed above) but leave the original server unlocked and document all the steps. This means you'll need to do it twice, but gives you the room to take your time reducing stress and presure to do it quickly (the old site can keep chugging away merrily).
Then once you have it all documented and running sweet (on your dev VM) repeat the process but this time lock the original server while you do it. It should be quick and easy second time around (as long as your documentation is good!).
Yep you got it! :)
I just edited my previous post to make my intention clearer.
And yes you may need to do a little tweaking to initially migrate your data from your old Redmine appliance. Personally I'd do that with a backup (as discussed above) but leave the original server unlocked and document all the steps. This means you'll need to do it twice, but gives you the room to take your time reducing stress and presure to do it quickly (the old site can keep chugging away merrily).
Then once you have it all documented and running sweet (on your dev VM) repeat the process but this time lock the original server while you do it. It should be quick and easy second time around (as long as your documentation is good!).