I have a headless Ubuntu server acting primarily as a file server. It has 2 hard drives - a primary 500GB drive and a recently added 1TB drive. The 1TB drive is partitioned to 2, each having 500GB.
The 500GB - the bootable disk - houses around 8 years of photos and movies. I want to back up the primary 500GB drive to one of the partitions on the 1TB disk. However, I want the backup to be bootable (probably as an image?) so that I can easily restore the main 500GB should anything happen to it. I was thinking of Clonezilla perhaps, and saving the image to one of the partitions on the 1TB. However, this would mean that I would have to restart the machine, boot via a USB disk, etc. Since this machine is on 24/7, I was hoping that there is a way to back up the main drive without any downtime (a cron job perhaps?). I tried Googling for a solution, but I may have used wrong search terms because I wasn't able to find anything useful. Any tips on how to solve this would be appreciated. :)
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