I need to save data from a failing hard drive.
- using dd/ddrescue/myrescue/clonezilla to simply clone the failing drive to a new drive of identical capacity
- using rsync/tar/cp to move files from the failing drive to a new drive
dd-ish choices avoid moving data back and forth between kernel-space and user-space, right? But rsync and others avoid moving empty space, right?
Another oddly fortunate bit if I choose a dd-ish solution: the failing drive is currently mounted read-only (part of the failure process, I think) so I guess I don't have to worry about data changing while I'm dd'ing.
This is the root partition, so dd would be handy in that I should be able to boot the new drive after it completes.