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Prerequisites for hot plugging

To achieve hot swap, you need to support the following aspects: bus electrical characteristics, motherboard BIOS, operating system and device drivers. Then we can achieve hot swapping by simply determining that the environment meets the above specific circumstances. The system bus supports some hot plug technology. Drivers, for Windows NT, Novell’s Netware, SCO UNIX drivers have integrated the hot-swap function, as long as the driver for the above operating system is selected, the last element of hot plugging is available.
working principle
characteristic
Since the 586 era, the system bus has increased the expansion of the external bus, so our concerns can be eliminated.
Motherboard BIOS
Since 1997, the new BIOS has added support for plug-and-play functionality, although this plug-and-play support does not represent full hot-swap support, only hot add and hot swap, but this is our The most used technology in hot plugging, so the motherboard BIOS can also be overcome.
operating system
In terms of operating system, it has been supported for plug-and-play since Windows 95, but the hot-swap support is very limited. Until NT 4.0 began, Microsoft began to notice that the NT operating system will target the server field, and hot swap in this field. Is a key technology, so the operating system has added full hot plug support, and this feature has continued to the Windows 2000/XP operating system based on NT technology, so as long as the operating system with NT4.0 or higher, hot The plug-and-play operating system provides complete support.
Device driver
Drivers, for Windows NT, Novell’s Netware, SCO UNIX drivers have integrated the hot-swap function, as long as the driver for the above operating system is selected, the last element of hot plugging is available.
Typically, a complete hot-swap system includes hardware for hot-swappable systems, hot-swappable software and operating systems, hot-swappable device drivers, and hot-swappable user interfaces.

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