I am lucky, my system backup went from about 13hrs a night down to about 1hr 15. You ask how I achieved this! By changing server! Thats it!!! My ultrium 1 is now working at full speed by swapping from a ML370G2 to a DL380G4. Its flying. As for restarts, I tend to hot restart them when assemblies are on or during lunchtime, the kids don't matter at lunch, the staff are key, so whilst they are eating, rebooting a couple will not harm anybody.