What does "hot-swappable" mean in the context of hardware?

In the context of hardware, "hot-swappable" refers to the capability of replacing or adding components while the system is powered on and operating, without the need to shut it down. This is particularly important in environments where uptime is critical, such as in servers or storage systems, as it allows for maintenance and upgrades without interrupting service.

Hot-swappable components might include hard drives, power supplies, or even some peripheral devices like USB drives. This feature is essential in maintaining operational continuity and minimizing downtime, making it a valuable aspect in various IT scenarios. Users can quickly replace malfunctioning parts or expand their systems seamlessly, contributing to greater efficiency and reliability in managing hardware.