A system administrator finds a server returned to the installation start screen after starting an OS installation from DVD. What should be done to correct this?

Modifying the device boot order in the BIOS is the correct solution in this scenario because it determines the sequence of devices that the server will attempt to boot from during startup. When an OS installation starts from a DVD but the server returns to the installation start screen, it likely indicates that the system is not actually booting from the DVD drive, but instead is either booting from the hard drive or another device.

By ensuring that the boot order is set to prioritize the DVD drive over other devices, such as the hard drive or network boot options, the system administrator can ensure that the server attempts to boot from the installation media. This is a common issue and correcting the boot order is often the first step in troubleshooting any installation problems related to booting from external media.

The other options, while potentially relevant in different contexts, do not address the immediate issue of the server not booting from the DVD correctly. Simply trying the installation again with a different DVD or monitoring the installation process does not resolve the potential misconfiguration in the BIOS settings. Swapping the hard drive is also not pertinent if the goal is to boot from the installation media, as this would not affect the boot sequence or the ability to initiate the installation from the DVD.