I use
Killdisk, it has the advantage of working with any disk and any OS as long as you can boot from a floppy drive. Saves getting the specific tools from each HD manufacture. The free version will perform a single pass 0 to prepare the disk for a fresh build. The pro version can carry out a secure clean, much slower multi pass. I have just had a look at their web site and there are two versions available, the first is free it uses a single pass only, the second the Pro has the added security technology multi pass $29
A word of caution, I have noticed that a number of manufactures are sending out the OS and any software they supply in a compressed form on CDs this is sometimes linked to look for the original build partition on the disk. If a low level format or a run through with 0 is carried out the manufacture’s disk may not work. You can normally overcome the problem but that’s another story.
SuperCub