Hochfahren

Hochfahren refers to the process of powering up and bringing a device or system from an off state to an operational state. In common usage it describes starting a computer, server, or other electronic equipment. The term can also apply more broadly to bringing machinery, services, or complex systems online after a complete shutdown or after maintenance.

In computing, Hochfahren begins when power is supplied. The firmware (BIOS or UEFI) performs hardware checks (POST), initializes components, and locates a boot loader on a storage device. The boot loader (for example GRUB or Windows Boot Manager) loads the operating system kernel into memory. The kernel initializes drivers and essential services, and then starts an init system (such as systemd, Upstart, or SysVinit) that launches background services and user interfaces. When the system is ready, a login prompt or graphical desktop is presented.

Hochfahren can be affected by hardware or software issues: faulty memory, corrupted boot sectors, missing drivers, or failed updates can prolong boot time or prevent startup. Troubleshooting often involves entering recovery or safe mode, checking boot logs, or repairing the boot loader or filesystem. Regular maintenance, such as keeping firmware and drivers up to date, can reduce problems.

In other contexts, Hochfahren is used for starting up machinery, industrial processes, or power grids, where it often implies a controlled ramp-up of a system’s operational state.

See also: Booting, Neustart, Herunterfahren, Safe mode.