[ubuntu] mounting error

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http://ubuntuforums.org – I am running Ubuntu 11.10 from a partitioned external hard disk with Windows 7 on my main PC internal HDD. When I go into the Home Folder and click on System Reserved, I get the following message: Error mounting: mount exited with exit code 1: helper failed with: [mntent]: line 1 in /etc/fstab is bad [mntent]: line 2 in /etc/fstab is bad mount: can't find /dev/sda1 in /etc/fstab or /etc/mtab What does this mean and can I do anything about it? (Hardware)