Chris G wrote:
All it needs is a time clock to power it up at 02:00, the BIOS set up to start up on power arriving and a cron job to shut the system down at 04:00, then the time clock removes power some time after.
Then one day the server boots up, decides to do a scan of the disks, takes its time, and power is cut half way through a backup. Or something.
I really wouldn't risk killing the power using a timer in this way. There'll always be a reason why it might shut off mid-way through something. Not unless your backups aren't important!