partprobe problem issue in 6.0

Today I found a problem during disk partition. After attaching a new hard disk to my system, I follow the procedure to create a partition. But right after creating a partition with "fdisk", I was trying to complete it without rebooting by parprobe. But after this "partprobe"command it is showing a message that you have to reboot the system. where as in my fdisk -l outout, newly created partitions are showing fine but I can't give a file system lable, also in my /proc/partitions, newly created partitions are not showing (it is logical). In my live server I cant reboot the system. What is the solution?

I am getting this error after giving the commands "partprobe"

Warning: WARNING: the kernel failed to re-read the partition table on /dev/cciss/c0d0 (Device or resource busy).  As a result, it may not reflect all of your changes until after reboot.
 

Please suggest me if I am wrong.

Thank you,

Shyfur