Thanks for your follow up.  Delete the RAID 5,  then create a RAID 1,  reinstall the OS  on a larger partition .   You should be good to go then.    Regards, 
Hii have      PowerEdge t420 with windows Server 2008 R2 Standard where i have set the roles File server e Terminal Server  primary partition (40 Gb) : A Raid partition  (~600Gb ) : B  Based on your experiences, I ask you :  1) the software installation directory for terminal server software goes in partiton A or B ?  In partition A where i must to extend the partition ? In partition B where i must to create only a folder and it is more performing ( together with data folder for user's files ) ? 2) for extend / shrink operations is better to use an external software as Gparted or there's a Dell specific utility or to use windows seven builtin utility ?
t420 partitions criterion for folders --> terminal Server application and 
user's files