Remote Mirroring DEFINITION: A means by which data is written to two duplicate disks simultaneously. If one of the disk drives fails, the system can instantly switch to the other disk, thus no data is lost.
Since the cost comparison between tape and disk is obviously far more complex than the media itself, this brief outlines all the considerations necessary for a more complete understanding of the benefit and true cost comparison between tape and disk to help IT professionals choose and justify their backup environment.
Backup is the core of data protection because it provides the ability to recover data from either physical disasters or common data loss conditions. But backup can have drawbacks - regular disruption of production applications, long recovery time, and significant data/work loss. Replication technologies were developed to shorten recovery time..
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