Table of ContentsView in Frames

Changing array LUN size or composition

Reconfiguring the size or composition of an array LUN must be done on the storage array. If an array LUN has already been assigned to a Data ONTAP system, you must use Data ONTAP to change the state of the array LUN to unused before the storage array administrator can reconfigure it.

Before you begin

The array LUN must be a spare array LUN before you can change its state to unused.


  1. On the Data ONTAP system, enter the following command to remove ownership information: disk remove -w LUNfullname
  2. On the storage array, complete the following steps:
    1. Unmap (unpresent) the array LUN from the Data ONTAP systems so that they can no longer see the array LUN.
    2. Change the size or composition of the array LUN.
    3. If you want Data ONTAP to use the array LUN again, present the array LUN to the Data ONTAP systems again.
      At this point, the array LUN is visible to the FC initiator ports to which the array LUN was presented, but it cannot be used by any Data ONTAP systems yet.
  3. Enter the following command on the Data ONTAP system that you want to be the owner of the array LUN: disk assign {disk_list | all | [-T storage_type] -n count|auto} [-c block | zoned] [-o owner_name] [-s sysid] [-f] [-p pool]

    After the ownership information is removed, the array LUN cannot be used by any Data ONTAP system until the array LUN is assigned again to a system. You can leave the array LUN as a spare or add it to an aggregate. You must add the array LUN to an aggregate before the array LUN can be used for storage.