
Originally Posted by
mitchsc
Do these delete partitions as well?
Yes, and then some. They operate on the whole disk. The free version of Killdisk overwrites the entire drive with zeros. DBAN and the commercial version of Killdisk supports multi-pass overwrites with various data patterns and methods.
If you don't need or want the software that comes with integrated external drives, another option is making your own with a bare drive and an external enclosure such as
IcyDock. This approach can be less expensive, affords specific selection of drive size/type and interface combinations (USB, Firewire, eSATA... ), and allows the drive to be replaced or upgraded easily when it eventually fails.