Netapp simulator consuming most of the space of my drive (Vmdk File size increasing automatically)

[ Edited ]

 Hi Netapp Support Group Team,


I have allocated the isci storage from netapp simulator to vmware ESX 5.0 server installated  on vmware player on my laptop and due to some unknown reason the vmdk files mentioned in the screenshot size is increasing and consuming my most of the drive space . So please suggest whey the vmdk file size is increasing even there is no snapshot exist on volume of netapp volumes and vmware. The vmdk size has made my drive full. And only one vm of size 2.5 exist on the datastore of vmware and i am not sure how 17 GB of space is consumed on my drive.