[jh05013]

Originally Posted by gold stinger

It's more likely they never tested their backups to see if they did indeed work, and when they checked, they didn't work.

The Korean version says that the backup got corrupted in succession, so I think it got corrupted either along with the server or while they were trying to recover the data. It's still a bit ambiguous to say which.

Neither would've happened with a proper maintenance though...