text: This command creates a thin-provisioned volume with 10 GB of virtual capacity. The volume 
  belongs to the storage pool that is named Site1_Pool and is owned by input/output (I/O) 
  Group io_grp0. The real capacity automatically expands until the real volume size of 10 GB is 
  reached. The grain size is set to 256 KB, which is the default. 
  
  **Disk size:**When the**-rsize**parameter is used to specify the real physical capacity of 
  a thin-provisioned volume, the following options are available to specify the physical 
  capacity:**disk_size**,**disk_size_percentage**, and**auto**. 
  
  Use the**disk_size_percentage**option to define initial real capacity by using a percentage 
  of the disk’s virtual capacity that is defined by the**-size**parameter. This option takes as 
  a parameter an integer, or an integer that is immediately followed by the percent (%) 
  symbol. 
  
  Use**disk_size**option to directly specify the real physical capacity specifying its size in the 
  units defined by using the**-unit**parameter (the default unit is MB). The**-rsize**value can 
  be greater than, equal to, or less than the size of the volume. 