Method of using an information handling system having a boot file, and an information handling system and machine-executable code for carrying out the method

An information handling system and a method of using it can allow the information handling system to be started or restarted and have an operating system loaded, even if a boot variable within a persistent memory is currently invalid. The method can detect and determine a hardware path name to a new drive that has an operating system. The new drive can have a relative path name to boot entries that include a pointer to a boot file. The boot file can be executed to run a boot loader that loads the operating system. During loading of the operating system, other boot entries within the drive can provide boot parameters. The boot variable within persistent memory, and potentially the relative path name or boot parameter(s) can be updated on the new drive. In a particular embodiment, the information handling system can include a unified extensible firmware interface (UEFI).