I've currently got a Mac Pro with data on one volume, and the OS/Applications sitting on an SSD. Both are backed up to a second partitioned drive as part of my overall backup strategy.
In both cases, the description of the scheduled task reads as follows:
If you have backed up to this destination in the past, only items that have been modified since the last backup task will be copied.
- Data Drive
- Used space: 346.05GB
- Backup partition: 442.67GB
- OS/Apps Drive (shows as bootable on startup)
- Used space: 78.49GB
- Backup partition: 76.13GB
I'll probably test drive a "let's use the backups and see what happens" test shortly, but does anyone have any idea as to what is causing the difference? If it helps any, the OS/Data split in the user files was done using this technique: http://eshop.macsales.com/Reviews/Framework.cfm?page=Tips/relocate3/relocate3.html
Is there a better backup technique to be using with this setup?