By design DBAN is supposed to destroy the data, not the drive.
However, some of the more overzealous erasure modes of DBAN overwrite every single bit on the drive multiple times with multiple different values. For example, the "gutmann" mode will do 35(!) overwrites of every single bit. This kind of abuse is not how drives are usually used and can reduce the lifetime of the disk considerably.
And you probably don't need to do that anyway. For most scenarios, a single overwrite with zeroes ("quick" mode) is more than enough. That is all that is needed to make sure that no data can be restored via software methods.
More overwrites are only required to foil forensic methods which go for the hardware. For example, if you believe that someone might go so far as to disassembles your drive in a lab and examine it with an electron microscope cell-by-cell. Which is far too impractical and unreliable for anyone who doesn't expect to find some very important data on your drive (matter of national security, millions of bitcoins, etc). And if you indeed face adversaries which are able and willing to invest that many resources into restoring data from your hard drive, then 3 overwrites with random data ("dodshort") should suffice to foil their dastardly plan of villainy.