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#11
In my previous life I was a regional LAN/WAN network manager. When we first got LAN's (to replace IBM 3270 "dumb" terminals) we made a full file server backup on Monday night (actually Tuesday morning at 2am) and then Incremental backups Tuesday, Wednesday, Thursday and Friday nights. If a file server had to be restored, the time required to load the Monday night full back up and then whatever Incrementals that were required took much longer than just reinstalling from a full backup. There were some problems (operator error) that Incrementals were installed in the wrong order and that required starting over. For that reason it was decided to only do full backups every night. The backups took a little longer, but at 2am nothing was going on (office business hours were 8am to 5pm) so it didn't mater.