Disk reorg on DMX 950

Dear All ,

1.My current storage is DMX 3 950 , i want to extend DB disk size by using another lun  but want to check this model storage will auto data spread across the disk to improve performance after that?

2. May i know how can check how many disks to form disk group by symccli ?

3. The hosts manage the VCS cluster , i want to check which disk group map to the device id

4. How can i check meta and hyper disk allocation by command?

Thank you very much