Hot Plugging The ability to add and remove devices to a computer while the computer is running and have the operating system automatically recognize the change. Two external bus standards -- Universal Serial Bus (USB ) and IEEE 1394 -- support hot plugging.
The ability to connect and disconnect peripherals from a computer without restarting the computer. Newer standards such as Firewire and USB allow hot swapping, while older standards such as SCSI and parallel ports do not.
Is when a device is enclosed in an enclosure (often called a rack) that allows the device to be removed while the computer system using it remains in operation. This is done by providing a signal to the computer's I/O controller so the device appears to be connected (on-line) while it is being replaced. Hot swapping in combination with RAID technology and frequent backups provides improved disk performance and reduces down-time due to drive failure. This is because the entire system does not need to be shutdown in order to replace a faulty device.
Hot swapping or hot plugging is the ability to remove and replace components of a machine, usually a computer, while it is operating. Once the appropriate software is installed on the computer, a user can plug and unplug the component without rebooting. A well-known example of this functionality is the Universal Serial Bus (USB) that allows users to add or remove peripheral components such as a mouse, keyboard, or printer.