Web Manager for Administrators > Configuration>System>Boot Configuration > Local Boot Options

Local Boot Options
To understand the “Unit boot from” options, the administrative user need to understand how the OnSite handles software upgrades:
The first time you download and install a new software version from Cyclades, the new image is stored as “image2” in the Flash memory and the configuration is changed to boot the OnSite from “image 2.”
The second time you download a new software version, the latest image is stored as “image 1,” and the OnSite configuration is changed to boot from “image1.”
In the “Unit boot from” pull-down menu, the entry for the current image is selected by default. The word “image” is followed by the number, followed by a colon (:), followed by the name of the file, including the version number. The menu item has the following format:
image1:zvmppcons.v version_number
The entry for the first release of the software, which is installed in the image1 area, is:
image1:zvmppcons.v100
After one or more software upgrades have been performed, a second image also appears in the menu, for example:
image1:zvmppcons.v100
image2:zvmppcons.v101
If, for any reason, the system should boot from another image than the one currently selected, the administrative user can select that image from the “Unit boot from” menu.

Web Manager for Administrators > Configuration>System>Boot Configuration > Local Boot Options