Thin provisioning

Storage users generally over-estimate their disk space requirements as they have very little idea about how their requirement will grow over time. So each user tends to keep a little 'buffer' in their storage capacity estimates and this adds on to a huge storage capacity out of which only less than half the storage capacity gets consumed. For whole of the storage capacity the organizations pay a huge sum and if they are paying for something which they are not even using then it is a drawback. To avoid this one can use thin provisioning; this dramatically improves the storage capacity utilization within an organization and thereby reduces costs significantly.