Upgrade weekend

The start of what could be a nice simple weekend or a nightmare. We are upgrading a fairly large application which I am involved in to ND6. The actual server upgrades are happening this morning and then a compact starts at lunchtime which will take some time as our nsf's are about 40gb in total. The plan is for me to go in for an hour or so this afternoon to make sure everything is progressing OK and then get in for 07:00 tomorrow to do the main bit of upgrade work for the application. Hopefully it should all be done by 13:00 but I have learned never to make assumptions about these things.