Hi
i have install hyperVM with XEN
after create vms and select resource like hdd and ram... UNLIMITED !
in " admin " see we have 600 GB space
but
when i go to vm panel ! see: disk usage MAX: 3 GB !!

Xen assign VM's disk space, even if the VM has not yet used the disk space Xen will assign the VM the disk space so it looks like the space has already been used. Also try deleting the VM using the LV commands from within SSH, rebooting the server and try creating it again.

You also cannot create multiple VM's in Xen with unlimited resources, only 1 VM can have unlimted everything.