MSA 2040 adding physical disk in virtual pool

Hi everyone,

It's possible to add a physical disk in a virtual pool?

 This is my scenario:

 SAN HP MSA 2040

 Controller A:

- virtual pool : vDisk1

- RAID 5: 5 disks SAS 600GB per disk, total size 2395 GB

 Controller B:

- virtual pool: vDisk2

- RAID 5: 6 disks SAS 600GB per disk, total size 2995 GB

 Now I want expand the physical disk in vDisk1 and vDisk2, but the option modify groups disk is greyed, bacause I can modify only linear disk type.

 How I can add a physical disk?

 Thank you