The storage system automatically boots Data ONTAP from a boot device, such as a PC CompactFlash Card. The system's boot device, shipped with the current Data ONTAP release and a diagnostic kernel, contains sufficient space for an upgrade kernel.
The storage system can be upgraded to the most recent Data ONTAP release. When you install new software, the download command copies a boot kernel to the boot device. For more information, see the Data ONTAP Upgrade and Revert/Downgrade Guide for 7-Mode.