How to avoid backup booting?

[frogtaco]

Originally Posted by dnanian

Well, you need to ensure that your options don't set the backup drive as the startup drive, nor start up from it.

Thanks for your response! You're referring to SuperDuper backup job options, correct? They definitely don't include Reboot From Backup or however it's phrased.

Originally Posted by dnanian

Otherwise, the only thing that could cause this is an internal drive that isn't responding as it should. In that case, the BIOS (EFI/OpenFirmware) would look for and start up from the next available bootable device...

I've had this happen on both my iMac G5 and my MacBook Pro since implementing SuperDuper with external backup drives. Are you suspecting the internal drives might be thinking about failing?

Thanks!