Lenovo DM120S, Installation And Cabling Manual, Page: 17 / 70

About this task
• For an explanation and examples of shelf-to-shelf “standard” cabling and shelf-to-shelf “double-wide”
cabling, see the “Shelf-to-shelf SAS connection rules” section.
• Instructions about how to read a worksheet to cable controller-to-stack connections can be found
towards the back of this guide.
• After you have cabled the hot-added disk shelves, ONTAP recognizes them: disk ownership is assigned if
disk ownership automatic assignment is enabled; disk shelf (IOM) firmware and disk drive firmware should
automatically update if needed; and if in-band ACP is enabled on your configuration, it is automatically
enabled on the hot-added disk shelves.
Note: Firmware updates can take up to 30 minutes.
Step 1. If you want to manually assign disk ownership for the disk shelves you are hot-adding, you need to
disable disk ownership automatic assignment if it is enabled; otherwise, go to the next step.You
need to manually assign disk ownership if disks in the stack are owned by both controllers in an HA
pair.
You disable disk ownership automatic assignment before cabling the hot-added disk shelves and
then later, in step 7, you reenable it after cabling the hot-added disk shelves.
a. Verify if disk ownership automatic assignment is enabled:
storage disk option show
If you have an HA pair, you can enter the command at the console of either controller.
If disk ownership automatic assignment is enabled, the output shows “on” (for each controller)
in the “Auto Assign” column.
b. If disk ownership automatic assignment is enabled, you need to disable it:
storage disk option modify -node
node_name
-autoassign off
You need to disable disk
ownership automatic assignment on both controllers in an HA pair.
Step 2. If you are hot-adding a stack of disk shelves directly to a controller, complete the following
substeps; otherwise, go to step 3.
a. If the stack you are hot-adding has more than one disk shelf, cable the shelf-to-shelf
connections; otherwise, go to substep b.
Chapter 2
.
Hot-adding disk shelves with IOM12 modules
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