Specify Drive Letter and Disk size using Powershell

i trying create simple volume on disk number 3 , assign drive letter (g) , disk size (10gb).  -assigndriveletter command won't take g , -size command isn't taking 10gb.

any ideas?  thank you!

new_partition -disknumber 3 -assigndriveletter g -size 10gb        not working

also, -assigndriveletter switch parameter, doesn't take argument.  there second parameter, -driveletter, used specify drive letter.  try this:

new-partition -disknumber 3 -assigndriveletter -driveletter g -size 10gb

Windows Server  >  Windows PowerShell