How to access the internal hard disk with full permissions? My Mac does not start anymore. The hard disk is stranded :-( Macs and gravity are not good friends.

When starting on a backup disk, I manage to see some contents of the internal disk Macintosh HD, but strangely some permissions prevent me to see everything. For example, in Users, I cannot explore all the home folders. 

[Edit]


How can I access the internal hard disk with full permissions ? 
Why don't I see everything on the internal disk when it is not the boot disk ? 


I want to salvage the data. To do this, I intend to do copies with the Finder.

Thank you for your insight on this delicate matter. 

The internal disk, and the backup disk, have Mac OS X Snow Leopard.
One way to recover files from a "broken disk" without buying software, is to use the Target Disk mode.

You will need a second mac to do that, to which you would transfer the files.