it sounds to me like your linux partition is running under a dos or ntfs partition type. Did your linux installation format the drive as linux native when you installed. Some linux installations will attempt to "coexist" with windows on a fat or ntfs drive. If this is the case, reformat as linux native and install linux.
running linux and windows on the same system
in Everything Linux
Posted
it sounds to me like your linux partition is running under a dos or ntfs partition type. Did your linux installation format the drive as linux native when you installed. Some linux installations will attempt to "coexist" with windows on a fat or ntfs drive. If this is the case, reformat as linux native and install linux.