[dnanian]

Right - as sjk says, you'd need two volumes on your backup, one for each source volume. Then, schedule two separate backups, one for each source to its corresponding destination.

Note: if you don't name your backup drive the same as the original, your "link" to your Home folder on the other drive will not point to the backup - it'll point to the original drive. This is likely a good way to get yourself in some trouble, so be very careful.