Hot swapping

Hot swapping is the replacement or addition of components to a computer system without stopping, shutting down, or rebooting the system;[1] hot plugging describes the addition of components only.[2] Components which have such functionality are said to be hot-swappable or hot-pluggable; likewise, components which do not are cold-swappable or cold-pluggable.

Most desktop computer hardware, such as CPUs and memory, are only cold-pluggable. However, it is common for mid to high-end servers and mainframes to feature hot-swappable capability for hardware components, such as CPU, memory, PCIe, SATA and SAS drives.

A well-known example of hot swap functionality is the Universal Serial Bus (USB) connection, which allows users to add or remove peripherals such as a mouse, keyboard, printer, or portable hard drive. Such devices are characterized as hot-swappable or hot-pluggable depending on the supplier.

Most smartphones and tablets with tray-loading holders can interchange SIM cards without powering down the system.

Dedicated digital cameras and camcorders usually have readily accessible memory card and battery compartments for quick changing with only minimal interruption of operation. Batteries can be cycled through by recharging reserve batteries externally while unused. Many cameras and camcorders feature an internal memory to allow capturing when no memory card is inserted.


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This article uses material from the Wikipedia article Hot swapping, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.