I have a client that I'm setting up Time Machine to backup his Macbook Pro. He's running OSX Mountain Lion, but soon to upgrade to Mavericks.
It has been backing up using Time Machine and an external USB drive.
He wants to add a 2nd USB drive to get a weekly backup that he'll store offsite.
We've setup the 2nd drive and had Time Machine point to that 2nd drive and it is creating an initial backup now to it.
- If he unplugs the 2nd drive after the initial backup and then takes it home, when he plugs it back in next week does it backup what has been changed since today's initial backup to it? Meaning, does Time Machine base the backup off of the destination media in conjunction with the source? Or will it only backup what hasn't been backed up in the last hour (assuming the 1st external drive is plugged in this whole week and Time Machine has been backing up as normal to it)?
- Will Time Machine treat each external backup drive as 2 independent backups, each with their own "sync" with the source hard disk?
Basically, what I want to make sure happens is:
- EXTERNAL DRIVE #1 = NORMAL backups....daily/hourly/weekly/etc. always plugged in.
- EXTERNAL DRIVE #2 = WEEKLY/DR backups....only plugged in once a week (or less) and backs up everything since the last time it was plugged in...regardless of what the backups for EXTERNAL DRIVE #1 have been doing.