Traditional disk wipers are often stuck in bad sectors leaving no time to sanitize data on healthy area of the disk, or just skip them leaving sensitive information around bad sectors not erased. WBD(Wipe Bad Disk) can thoroughly wipe disks with bad sectors in a hierarchical and elegant way. Even the disk has no bad sectors, you can also take advantage of the WBD's unique wiping algorithm to gain high security degree in a short time.