[ubuntu] Cannot change partition table?

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http://ubuntuforums.org – Hi, I recently decided to put ubuntu on my eee 1000 rather than windows 7. The problem I'm facing is that whatever changes I make to the partition table (be it via fdisk, sfdisk, gparted, ubuntu installer) are lost as soon as I exit the application, reverting to the old partition table. nothing seems to stick. None of the applications report any errors in what they are doing, but next time you load them you are right back where you started. I've even tried using parted magic to the same effect. Help! (Hardware)