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I've decided that I want to dual boot Windows 7 and Ubuntu 11.10. Windows for games, and Ubuntu for projects, programming and other stuff. Now, first of all, how was I supposed to know how much memory would each of these systems need at the time of installation? I guess I had to think before I acted... Anyway, When that slider showed up, I slid it all the way to the right, giving Ubuntu only 50Gb, I think. Now, did Windows get all other ~600Gb my laptop has, or did I accidentally create a "shared" partition only for files? Anyway, what should I do if I decide that I need more memory on my Ubuntu system?

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Firstly, back up your important Windows and Ubuntu data to external media and test that the media is readable on other systems. If you don't, you may regret it

Then use partition management tools (there are many, e.g. gparted, ntfsresize) to resize the partitions.

In my experience, NTFS partitions sometimes need to have chkdsk run on them when they are expanded. In theory a good partitioning tool should expand the filesystem as well as the partition.

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