I took out a 160 gb internal hdd and put it into an enclosure. Currently it looks like as in the pic (Disk 1). I am looking to sell this to someone, and what I want to do it is remove the partitions and then again make the partitions, I want the 100 mb unallocated space to be in one of the partition. I just want to sanitize the disk, plz feel free to suggest any other way.