Unable to Mount Internal HD

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http://ubuntuforums.org – Hi, I'm new to ubuntu. I have ubuntu installed on an external hard drive and was planning on using it to copy files off my MacBooks harddrive which won't boot ever since i tried updating to os x mavericks. I don't have an external hard drive big enough to simply create a disk image and there are only a couple of important files that i need, the rest i can do without. So i figured I'd install ubuntu and just copy the files I need off the mac's hard drive. At first I couldn't access the files because the drive was mounted as read only but now the hard drive won't mount at all. I get the error: (Hardware)