Mac OSX hard disk gives invalid PEOF - how do I back up data? Yesterday my macbook pro (running 10.6.8) refused to reboot, and after booting it using the install disk and running disk utility I got Invalid catalog PEOF. The volume could not be verified completely. So, from the looks of it, I may have to reinstall the OS:


Is there anything else I can try?
If not, how can I access the disk and try and save some data before formatting (if at all)?


I'm not stranger to command line unix and all that if needs be. Any help will be great, thanks.
Do you have another Mac? If so you can connect the failed Mac to your other mac via firewire and you target disk mode.

Power off the failed mac, connect it to the working mac via firewire. (The working mac can already be powered on) Boot the failed mac and immediately hold down the T key on the failed mac. Continue holding it until the firewire icon shows up on screen. You should then see the mac mounted on the working mac. 

Link with more details http://support.apple.com/kb/ht1661

Also an interesting link with some details on your error http://support.apple.com/kb/TA21624?viewlocale=en_US