Delete all partition/volume with Disk partition expert

First of all, you should download the excellent disk partition software

Get it from CNET!
  1. Launch the Macrorit Disk Partition Expert, you'll see all detail information of the partition and disk.

  2. Right-click the disk you need to delete, and then click delete all partitions..


  3. Click OK to add the pending volume creating operation.


  4. In the end, Click "Apply changes" button, the changes can take effect.