I had a customer whose Dell was hit by lightening. He knew he would have to purchase a new os (Thank you, microsoft) But he wanted to recover data from the hard drive. The only parts that were bad were the motherboard and the power supply, so a new case and a new board got him back into a computer. But, neither knoppix nor Mepis would copy the data from an ntfs partition to a usb backup drive I keep for the purpose. Changing permissions did nothing, and I was afraid it was the ntfs/linux issue. But, upon researching the net, gparted claimed to be able to handle the job. I found a bootable gpsrted iso, burned and, wow, it worked!
Now I have yet another disk for my tool chest, a gparted boot disk.