Cleaning Disk header or making ASM disk from member to candidate

We have to below operation for disk cleaning OR making ASM member disk to candidate disk:

# dd if=/dev/zero of=/dev/oracle/asm_ocr01 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_ocr02 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_ocr03 bs=1024k count=1000

1000+0 records in

1000+0 records out

#dd if=/dev/zero of=/dev/oracle/asm_vot01 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_vot02 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_vot03 bs=1024k count=1000

1000+0 records in

1000+0 records out

#

# dd if=/dev/zero of=/dev/oracle/asm_data01 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_data02 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_data03 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_fra01 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_control1 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_control2 bs=1024k count=1000

1000+0 records in

1000+0 records out

# dd if=/dev/zero of=/dev/oracle/asm_redo1 bs=1024k count=1000

1000+0 records in

1000+0 records out

#

# dd if=/dev/zero of=/dev/oracle/asm_redo2 bs=1024k count=1000

1000+0 records in

1000+0 records out