Hi, I recently installed a 500 GB Seagate Momentus XT in my 2010 MBP. Now I managed to get all my files onto the new hard drive via time machine after a clean install of Mountain Lion, the problem I'm now having is backing up the new hard drive to my time machine drive. It cleared off 260 GB off my 640 GB external drive, which I'm fine with, but now it's trying to write a 233 GB backup to the drive at about 10 Bytes per second. No joke, the counter increases by a kilobyte once about every two minutes. At this rate it will take more than a century to complete this backup, and I and the computer both will be long dead by the time that happens. This is just flat out ridiculous. Has anybody heard of this kind of behavior? I verified the time machine disk with disk utility and it passed, the only things I can think of are spotlight or disk fragmentation screwing up the works. Time Machine backups were perfectly fast in Mountain Lion and Sow Leopard before I upgraded the hard drive. If need be I can get a network AFB share running on a Linux box of mine to see if that backups my laptop any faster. If that worked I would try reformatting my time machine drive next.