Is there a way to remount / as read-only and buffer new writes in RAM, so can backup the / media with dd?
I want to create a bootable image from my SoHo-Server (Debian 6) without a live cd or any downtimes. The only tool I know that can do this is dd but I would need to lock the root patition to keep the filesystem consistant. It's just a 16GB USB drive, so it wouldn't take too long and RAM is large enough .
Or is there an other approch to do this?
As far as i know rsync is not able of keeping consistancy like ShadowVolumes on Windows could.