Configuring automatic ownership assignment of disks

If you have unowned disks on a stack, loop, or shelf, you can configure Data ONTAP to automatically assign disk ownership at the stack or shelf level.

Before you begin

Your system must adhere to the requirements for automatic disk ownership.
If you have multiple stacks or shelves that must have different ownership, one disk must have been manually assigned on each stack or shelf so that automatic ownership assignment will work on each stack or shelf.

About this task

For most system configurations, you can use automatic assignment at the stack or loop level; for smaller configurations, you can use automatic assignment at shelf level.

You can use automatic assignment at the shelf level for the following system configurations:

Your storage system supports only one stack or loop.
Your storage system contains two controllers but only a single stack with more than one shelf.
Your MetroCluster configuration consists of one stack or loop for each node and two shelves.
With shelf level automatic assignment, you can have one shelf for one pool and one shelf for the other pool.
You have any other configuration for which you cannot assign an entire stack or loop to a single system or pool.

If the disks on a single shelf have ownership split between two systems, you need to manually assign those disks; you cannot use automatic disk assignment for the disks on that shelf.

Steps

The action you take depends on whether you want to set up automatic ownership assignment at the stack, loop, or shelf level:

If you want to...	Then...
Configure automatic ownership assignment at the stack or loop level	Set options disk.auto_assign to on.
Configure automatic ownership assignment at the shelf level	Set options disk.auto_assign to on and options disk.auto_assign_shelf to on.
Turn off automatic ownership assignment	Set options disk.auto_assign to off and options disk.auto_assign_shelf to off.

Example

For example, you have a shelf whose disks are owned by one system and another shelf on the same loop whose disks are owned by a different system. In this case, you would configure automatic ownership assignment at the shelf level.

options disk.auto_assign on
options disk.auto_assign_shelf on

Data ONTAP automatically assigns unowned disks on the stack, loop, or shelf, depending on the command you entered.

Verify the automatic assignment settings for the disks: disk show -o owner_name -v