Hi,
I think you can. See here:
I created a volume of 60m:
[root@shoemaker-rhel6x64-01 ~]# ssh sin vol size volt
root@sin's password:
vol size: Flexible volume 'volt' has size 60m.
Set snap reserve to 0%
[root@shoemaker-rhel6x64-01 ~]# ssh sin snap reserve volt
root@sin's password:
Volume volt: current snapshot reserve is 0% or 0 k-bytes.
Tried to create a LUN of 60m with no reserve:
[root@shoemaker-rhel6x64-01 ~]# ssh sin lun create -s 60m -t windows -o noreserve /vol/volt/lunt
root@sin's password:
lun create: created a LUN of size: 62.8m (65802240)
Hope this is useful
Thanks,
Arun