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Message: <blockquote data-quote="ian2002" data-source="post: 1618242" data-attributes="member: 306311"><p>I had the same problem as the OP.  I upgraded to Yosemite on my work machine, and then a week later a power surge scrambled my hard drive.  I used the Restore function, and opted to restore from the most recent backup.  Even though I had multiple backups made while running Yosemite, Time Machine would only install the last backup made under Mavericks.  So I ended up with a Mavericks machine again, and had to re-install Yosemite.  Concerned, I went home and tried to restore a file from Time Machine on my home machine.  No go, I could only access files backup up on the previous OS X.  Verifying the firewire backup drives fixed both problems.  I have no idea why, but Time Machine now works.</p></blockquote><p></p>