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Changing a shelf ID for a

DM240N drive shelf

Changing a DM240N drive shelf ID

You can change a shelf ID in a system when ONTAP is not yet running or when adding a shelf prior to it being

cabled to the system.

Before you begin

• If ONTAP is up and running (controller modules are available to serve data), you must have verified that all

drives in the shelf are unowned, spares, or part of offlined aggregate(s).You can verify the state of the

drives by using the storage disk show -shelf shelf_number command. Output in the Container Type

column should display spare or broken if it is a failed drive. Additionally, the Container Name and Owner

columns should have a dash.

• You need a paper clip with one side straightened or a narrow tipped ballpoint pen.You use the paper clip

or ballpoint pen to access the shelf ID button through the small hole, to the right of the LEDs, in the

Operator Display Panel (ODP).

About this task

• A valid shelf ID is 00 through 99.

• Shelf IDs must be unique within an HA pair.

• You must power cycle a shelf (unplug both power cords, wait the appropriate amount of time, and then

plug them back in) in order for the shelf ID to take effect.The amount of time you wait before plugging the

power cords back in depends on the state of ONTAP, as described later in this procedure.

Note: DM240N shelves do not have power switches on the power supplies.

Step 1.

Power on the shelf, if it's not already on.

You connect the power cords first to the shelf, securing them in place with the power cord retainer,

and then connect the power cords to different power sources for resiliency.

Step 2.

Remove the left end cap to locate the small hole to the right of the LEDs.

Step 3.

Change the first number of the shelf ID:

a. Insert the paper clip or ballpoint pen into the small hole.

b. Press and hold the button until the first number on the digital display blinks, and then release

the button.

It can take up to 15 seconds for the number to blink. This activates the shelf ID programming

mode.

Note: If the ID takes longer than 15 seconds to blink, press and hold the button again, making

sure to press it in all the way.

c. Press and release the button to advance the number until you reach the desired number from 0

to 9.

Each press and release duration can be as short as one second.

The first number continues to blink.

Step 4.

Change the second number of the shelf ID:

a. Press and hold the button until the second number on the digital display blinks.

It can take up to three seconds for the number to blink.

The first number on the digital display stops blinking.

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