hi:
the situation comes with rhel 7.1 (or rhel 7.0 with recent updates). rear will load "scsi_debug" module automatically when restore. and that module will create a 8MB /sev/sda. the restore procedure will have trouble if the original system also have harddisk named /dev/sda.

I now use "EXCLUDE_MODULES" to exclude it. but I think maybe we can exclude it globally. I saw "scsi_debug" module at thel 6.6 also, but rear under rhel 6.6 won't auto load it, I don't know why rear under rhel 7.1 load it automatically.