käyttöjärjestelmänlevyinä

Käyttöjärjestelmänlevyinä, often translated as operating system discs or installation media, refers to the physical or digital media used to install, repair, or reinstall an operating system on a computer. Historically, these were typically optical discs such as CD-ROMs or DVDs, containing all the necessary files and instructions for the operating system setup. Today, installation media are frequently distributed via USB flash drives or as downloadable ISO image files that can be burned to a disc or used to create a bootable USB.

The primary purpose of operating system discs is to provide a bootable environment from which the installation process can begin. This allows users to partition hard drives, format storage devices, and copy the operating system files to the computer's main storage. In addition to installation, these discs often include recovery tools and utilities that can be used to troubleshoot problems with an existing operating system, such as boot failures or system corruption.

Creating bootable installation media is a common practice for system administrators and advanced users. This involves obtaining an official operating system image and using specialized software to write it to a USB drive or DVD. This ensures that a clean copy of the operating system is available for deployment or emergency repairs. The availability and format of operating system discs have evolved significantly with technological advancements, moving from physical media to more flexible digital and portable options.