Hello Zoid, If you have all the virtual disks in the same disk group then when you delete volume 1 the space will show under free space for the group.  Once the free space is shown then you can assign it to any other virtual disk that you would like.   Please let us know if you have any other questions.
Hi, I have a md3200i, with 12x1Tb in raid5 disks with a big volume at the begining and some smaller ones after that, with some free space at the end: volume1          8,192.000 GB  cluster2-vms    200.000 GB cluster2-vms2  100.000 GB  proxmox4        5.000 proxmox5        5.000 proxmox6        5.000 proxmox7        5.000 My question is, if I were to delete volume1, would it be possible to expand cluster2-vms or cluster2-vms2 or the free space used to expand a volume must be contiguous?  
Free space merging 