NetApp
Configuration : System Tools > Halt/Reboot : Halting storage systems

Halting storage systems
You can use the Halt and Reboot window to halt or shut down a storage system. You may shut down a storage system to perform maintenance on it.
Steps 
1.
From the Home tab, double-click the appropriate storage system.
2.
In the navigation pane, click Configuration > System Tools.
3.
Click Halt and Reboot.
4.
Perform the appropriate action:
Select Wait for clients and specify the time.
Select Dump core.
5.
Click Halt.
6.
Select the check box in the confirmation window and click Halt.