A real-time mirror won't help if your data gets corrupted (via a fat-fingered shell command, errant script, or a compromised system). When it's appropriate, it

A real-time mirror won't help if your data gets corrupted (via a fat-fingered shell command, errant script, or a compromised system). When it's appropriate, it's awesome, but I don't think it's a replacement for a static "offline" backup,