When shutting down a NetApp Filer, you should use the halt command. The halt command flushes file system updates (eg – flushing memory to disk) out to disks and clears NVRAM, which helps to make sure the system comes back online properly and no data is lost during the process (’cause you know, data loss is kinda’ bad on your storage devices, right). Flags that can be used with the halt command include -d, -t and -f, which sets a dump string (dirty shut down, only use this if a standard shutdown doesn’t work), an interval for the shutdown to occur (in minutes) and prevents other node from taking over as an active. After you run the halt command, when the NetApp shows a boot prompt, you can turn the power off.