I have already set the guarantee option to VOLUME. But it shows disabled.
Its an one TB volume with 825 GB of LUN ( No space reservation) inside.
Now i am working in the below link to find out solution for my problem
Please go through attached doc to get the situtauion in detail...
Aggregate 'aggr1'
Total space WAFL reserve Snap reserve Usable space BSR NVLOG A-SIS
2921GB 292GB 131GB 2498GB 0KB 262GB
Space allocated to volumes in the aggregate
Volume Allocated Used Guarantee
vmvolume00 1029GB 563GB volume
vmvolume01 731GB 726GB volume(disabled)
vmvolume02 402GB 172GB volume
Aggregate Allocated Used Avail
Total space 2163GB 1461GB 72GB
Snap reserve 131GB 15GB 116GB
WAFL reserve 292GB 30GB 261GB