Definitions for "Disk Mirroring"
There are two forms of RAID 1: disk duplexing and disk mirroring. Disk mirroring involves two hard drives that are on the same drive controller. The same...
Disk mirroring is the replication of data on separate disks in real time to ensure continuous availability, currency and accuracy. Disk mirroring can function as a disaster recovery solution by performing the mirroring remotely and over distance. Depending on the technologies used, mirroring can be performed Synchronously, Asynchronously, Semi-synchronously, or point-in-time. True synchronous mirroring can achieve a Recovery Point Objective of zero lost data. Asynchronous mirroring can achieve a Recovery Point Objective of just a few seconds while the remaining methodologies provide a Recovery Point Objective of a few minutes to perhaps several hours. Related terms: data mirroring, data replication, file shadowing, journaling.
Disk Mirroring protects data against hardware failure. In its simplest form, a two disk subsystem would be attached to a host controller. One disk serves as the mirror image of the other. When data is written to it is also written to the other. Both disks will contain exactly the same information. If one fails, the other can supply the user data without problem.
A form of backup in which anything that is written to a disk is written simultaneously to a second disk.
In networking, a fault-tolerant technique that writes the same information simultaneously onto two different hard disks using the same disk controller. In the event of one disk failing, information from the other can be used to continue operations
A fault-tolerant technique that writes data simultaneously to two disks using the same disk controller
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