Unable to do vxdiskunsetup after destroying cvm DG

Hi Guys,

  I am guys I am getting error while I try vxdiskunsetup after destroying CVM diskgroup and removing vcs SG.

  1. I had tried to clear the keys as well, but did not work that too.

  2. Disk is unprotected from SAN end.

  3. Not able to write label and perform dd as well.

 VxVM vxdisk ERROR V-5-1-531 Device "disk": destroy failed:
        Disk write failure
VxVM vxdiskunsetup ERROR V-5-2-5052 "disk": Disk destroy failed.

  Any urgent help would be appreciated so much.

Thanks.