My Time Machine Backups, formatted as Mac OS Extended case-sensitive with journaling, is outgrowing my 1T Seagate Freeagent external hard disk. I would like to replace it with a 1.5T Seagate Freeagent. I read that Disk Utility could be used to restore my old Time Machine Backups to the new disk, but I have tried this several times in vain. There was probably no problem during the initial phase of block copying, but the process always aborted with an error message that read, "input/ output error". I had formatted my new disk as Mac OS Extended with journaling. I did not forget to erase the new hard disk. I did not allow my iMac to sleep in case this might have caused the problem. As a last resort, I even tried to copy just the backup folder with "cp -Rp" only to learn that this did not work. It would be much appreciated if anybody could offer a solution. Many thanks in anticipation.