Hot Spare

A hot spare is a backup hard drive kept in a computer system that's ready to take over immediately if one of the active drives fails. It's like a reserve part that remains idle but constantly connected and ready to replace a failing drive without delay. This helps ensure continuous operation and minimizes data loss or downtime, especially in critical systems where reliability is essential. Once the active drive fails, the hot spare automatically takes its place, allowing the system to rebuild the lost data seamlessly.