Why do I need to reformat and erase backups on an external backup drive that I have been using for over a year, when I get this dialog box? The backup disk is not in Mac OS Extended (Journaled) format, which is required.

The backup disk is not in Mac OS Extended (Journaled) format, which is required.

Kappy's extensive hard drive formatting post - http://discussions.apple.com/thread.jspa?messageID=8340551 - note that instructions at end are for zeroing data.
BDAqua's Formatting instructions - http://discussions.apple.com/message.jspa?messageID=8901255
Pondini: Formatting,  Partitioning, Verifying,  and  Repairing  Disks... - http://pondini.org/OSX/Home.html

Similar Messages

Maybe you are looking for