Disk ownership determines which node owns a disk and what pool a disk is associated with.
Data ONTAP stores ownership information directly on the disk.
Types of disk ownership
The HA or Disaster Recovery (DR) state of the system that owns a disk can affect which system has access to the disk. This means that there are several types of ownership for disks.
Reasons to assign ownership of disks and array LUNs
Storage system ownership must be assigned for disks and array LUNs before they become an effective part of your system. You must explicitly assign ownership for array LUNs. Disks can be automatically or manually assigned.
Guidelines for assigning ownership for disks
When you assign ownership for disks, you need to follow certain guidelines to maximize fault isolation and to keep automatic ownership assignment working. The guidelines are impacted by your autoassignment policy.
Assigning ownership for disks
Disks must be owned by a node before they can be used in an aggregate. If your cluster is not configured to use automatic disk ownership assignment, you must assign ownership manually.
Assigning ownership for disks partitioned for root-data partitioning
For partitioned disks, there are three different entities for ownership: the container disk, the data partition, and the root partition. You can set the ownership of the container disk or the partitions manually or by using autoassignment—just as you do for unpartitioned disks.
Removing ownership from a disk
Data ONTAP writes disk ownership information to the disk. Before you remove a spare disk or its shelf from a node, you should remove its ownership information so that it can be properly integrated into another node.