The concept of dummy lun in technical terms is called as Creating a Lun z. LUNz has been implemented on CLARiiON arrays to make arrays visible to the host OS and PowerPath when no LUNs are bound on that array. When using a direct connect configuration, and there is no Navisphere Management station to talk directly to the array over IP, the LUNZ can be used as a pathway for Navisphere CLI to send Bind commands to the array. LUNz also makes arrays visible to the host OS and PowerPath when the host’s initiators have not yet ‘logged in to the Storage Group created for the host.  So in all this lun is created to check the connectivity between the array and the host before we bind the actual luns on the array and present it to the host.  Thanks
In clarrion, while creating luns in storage group first we are creating a dummy lun with host id 0. what is the use of this dummy lun ? what is the recomended size of this lun ??
what is the use of dummy lun with host id0 ?