Chapter 1. Hot-add a shelf - DM240N shelves
You can hot-add a DM240N drive shelf after your HA pair meets certain
requirements, and after the preparation tasks applicable to your HA pair are
completed.
1.1. Requirements for a hot-add
Your HA pair must meet certain requirements before hot-adding a DM240N drive shelf.
•Your system and version of ONTAP must support the DM240N shelf and drives you are hot-
adding.
•You must have the correct number and type of cables to connect the shelf.
•Your HA pair must have enough available RoCE-capable ports to support the number of
shelves you are hot-adding.
For each shelf you are hot-adding, you need a minimum of two RoCE capable ports on each
controller. These ports can be on board the controllers, on RoCE-capable PCIe cards, a
combination of both, or on RoCE-capable I/O modules, as supported by your system.
If your HA pair does not have enough available RoCE-capable ports, and your system supports
the use of RoCE-capable PCIe cards or I/O modules, you must have installed the additional
cards or I/O modules into the correct controller slots, as supported by your system.
Non-dedicated RoCE-capable ports must be configured for storage use (not
networking use).
Prepare non-dedicated RoCE-capable ports for a hot-add
•Your HA pair must have less than the maximum number of shelves supported, by at least the
number of shelves you plan to hot-add.
You cannot have exceeded the maximum number of shelves supported by your HA pair after
hot-adding shelves.
•If you are hot-adding a shelf to an HA pair that already has a DM240N shelf, your HA pair
cannot have any storage cabling error messages, and it must be cabled as multipath HA.
•To change the DM240N shelf ID, you can use a paper clip or ballpoint pen to access the shelf
ID button behind the Operator Display Panel (ODP).
1.2. Considerations for a hot-add
You should familiarize yourself with best practices and aspects about this procedure before hot-
adding a DM240N drive shelf.
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