The space has recently become unusable. But there were 4 NTFS partitions which were working fine on Windows. Hence I mentioned the Unusable Space is NTFS only. Initially I was working only with Windows 7. But when I tried to install UBUNTU Linux, it showed me only one partition out of my 5 partitions which I used for installing ubuntu (EXT4 FS).
I tried with partition magic.( I have never used that before). But it is showing my 476 GB as a single dynamic drive, and all the options like extend, delete,etc are greyed out hence I was not able to do anything using that. the drive is mentioned as *: , I am not sure whether this is how normally Partition magic will show the drive name. Kindly help. I have a backup of my important data, Hence I can even go for formatting the complete drive, if I have such an option.
Thanks and regards,