RAID-1, is commonly used, to mirror the boot disk on the system, in order to avoid work downtime and data loss. This means that if the one drive fails, all your data will be completely safe on the other drive. In RAID-1, the data are written identically to two (or more) drives at the same time. One of the most known RAID implementations, is the "RAID 1" level, which offers Hard Drive Mirroring. Commonly, for this purpose companies prefer to use the hardware based RAID technology, that combines multiple physical disk drive components into one or more logical units for redundancy, performance improvement, or both, by using a physical RAID controller which is integrated on the motherboard or as an extra add-in card. In a company environment, except the above precautions, IT Administrators must also take precautions to avoid any complications in company's work, after a hard drive failure. I always suggests my customers to frequently take a backup of their important files and data, to an external storage device, to avoid data loss after a hardware failure and to keep this storage device (with the backup) offline, in order to avoid data construction after a ransomware (virus) attack. The bellow procedure will help you to boot from the secondary mirrored drive if your primary boot drive fails to boot or becomes damaged. This tutorial contains instructions on how to mirror boot hard drive on Windows 10, on a legacy or an UEFI based systems.
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