Hi Strahil Nikolov
Thank you so much all your valuable input. Finally resolved the issue with below actions
1) shutdown all the vms running in the volume,
2) temporarily created new folders in another hdd drive ( in all three hosts) where it
had enough free space
3) expanded the issue volume by adding those new folders as a new bricks ( volume changed
from replicate to distributed replicate )
4) brought up the storage domain online and moved the over utilized disks to another
storage domain
5) removed the new bricks
now all are back to original setup.