Disk Mirroring is a data protection technique that involves creating an exact copy of data from one hard drive to another. This process ensures that if one drive fails, the other can take over without any data loss. It is commonly used in RAID 1 configurations, where two drives work in tandem to provide redundancy. In Disk Mirroring, data is written simultaneously to both drives, maintaining identical copies. This method enhances data reliability and availability, making it a popular choice for businesses and individuals who prioritize data security. However, it requires double the storage capacity, as each piece of data is stored twice.