The Alternate Control Path (ACP) protocol enables Data ONTAP to manage and control SAS-connected storage shelves, which can increase storage availability. After you ensure that ACP is properly enabled and configured, you do not need to actively manage it.
You can install SAS-connected storage shelves without configuring ACP. However, for maximum storage availability and stability, you should always have ACP enabled and configured, including providing the required physical connectivity and configuration parameters to enable the ACP functionality.
ACP is enabled by default. If you need to enable it or change its configuration, you can use the acpadmin configure and storage show acp commands, available through the nodeshell.
You do not need to actively manage the SAS-connected storage shelf subsystem. Data ONTAP automatically monitors and manages the subsystem without operator intervention.