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This question already has an answer here:

When I run installation of Ubuntu 12.04 LTS on my notebook Toshiba Intel core i5, 6mb RAM, 500 Gb.

I receive a message of "no root file system is defined"

What can I do?

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marked as duplicate by James Dec 24 '13 at 23:23

This question was marked as an exact duplicate of an existing question.

The image that you tried to enter is not having the link here. Please upload the image to a site and give the link. – user224082 Dec 24 '13 at 19:12

It appears to me you are not selecting a proper mount point during the installation for root ( "/" ).

Make sure you select and assign all the mountpoints according to your needs.

A mount point is a directory (typically an empty one) in the currently accessible filesystem on which an additional filesystem is mounted (i.e., logically attached).

Quote from

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