I need to wipe (securely erase) a specific part (the last third) of a partition, wiping the whole partition free space is not an option (as other regions contain deleted data that must stay recoverable).
The only idea I can see now is to truncate the partition, create a new partition on the place to wipe and wipe it.
Isn't there a better way? A wiping tool which can start wiping from a specific offset (given in gigagabytes)?
The file system is NTFS, the OS is Windows 7 but I wouldn't mind using a LiveCD of a sort.