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I just recently followed the tutorials on http://www.ubuntu.com/download/ubuntu/download for installing the ubuntu server onto my 1TB Seagate External. I was planning on using this to install it on my macbook and in these instructions it states to preform this line of code

Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2)

Now my HD prompts "The disk you inserted was not readable by this computer". Would I just run diskutil mountDisk /dev/diskN in order to be able to access all my files again?

here is a screenshot to the instructions i followed


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closed as too localized by Bruno Pereira Mar 18 '12 at 20:40

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I have a vague suspicion that you're trying to install Ubuntu on a MacBook and running that "diskutil" command on MacOS X. If so, then you should mention it directly in your question. "1TB Seagate" is the least important point to mention in this case :) –  Sergey Nov 11 '11 at 3:08
Also, it would be useful to know which exactly instructions you were following (I can't find anything at the link you've provided) and which steps you performed apart from unmounting the disk. –  Sergey Nov 11 '11 at 3:15
Yes, you would be correct Sergey, I'm using the instructions for installing it onto a macbook using an external HD. –  Taylor Guistwite Nov 11 '11 at 16:55
Can the macbook read the file format of the 1TB disk? Is it formatted in a Linux format that apple OS cannot read? –  grahammechanical Nov 11 '11 at 17:01
My TB was formatted for mac originally. This is the only thing i have done to the drive –  Taylor Guistwite Nov 11 '11 at 21:48

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