Reboot

A hardware reset ( hardware reset ) is the process of turning the computer off and on or sending a special reset signal to the processor. It restarts the computer without first preparing for the shutdown procedure. The file systems of many operating systems that use delayed recording, after a “hard” reboot, may be in an “unclean” state, and the systems run an automatic check of the file system, after which they can work normally. During the formation of computer technology, it was also called “cold” ( English Cold reboot ), but this interpretation is outdated and is no longer used by specialists today.

It can be caused by a power outage, accidentally or deliberately as a last resort, to restore the system in the event of a critical error or DoS attack .

On PC-compatible computers (primarily desktop ones ), hardware reboot is usually implemented by a 2-pin connector on the motherboard, the closure of which ( using the Reset button or in another way) starts the reboot process. On the server motherboards , there are no separate conclusions for Reset in most cases, and the conductors leading to the button on the front panel are integrated into blocks specific to each manufacturer.

You cannot block this type of reboot programmatically. Also, it cannot be initiated from the operating system itself without additional equipment ( see, for example , a watchdog timer ).

A software reboot is a reboot of a computer under software control, without turning off the power or sending a reset signal. Usually, but not always, it refers to shutting down and rebooting a machine. This operation is also available on some game consoles (such as PlayStation , for example) and is called up by repeatedly pressing the START+SELECT key combination.

In the original IBM PC, the keyboard shortcut Control+Alt+Delete or Control+Shift+Esc was designed for a quicker and more convenient soft boot.

A computer phenomenon when a computer reboots for no apparent reason and without prompting by the user. This situation can occur in case of hardware problems, or fatal crashes in the operating system, for example, kernel panic . The causes of spontaneous reboots are difficult to diagnose (due to poor repeatability).

In spacecraft, before completing a task, the maximum time is set that can be allocated for program execution (the so-called Watchdog timer ). If after this time the computer does not signal the end of the program, then the memory is forcibly cleared, since it is believed that the program either entered an endless cycle or the computer went into an undefined state, stopping operation and not responding to control signals, that is, " hung up . ” The solution through which such a reboot is performed is called the watchdog timer . The servers of a number of manufacturers regularly have such an opportunity that can be activated through the BIOS , either through special control interfaces or through software.

• Bootloader
• Hardware reset

• "Hardware Troubleshooting: Cold Booting Versus Warm Booting." Support. Microsoft July 7, 2005.
• Osterman, Larry (January 24, 2005). "Why is Control-Alt-Delete the secure attention sequence (SAS)?". Larry Osterman's WebLog. MSDN Blogs. Retrieved March 15, 2007.