Disk Duplexing

Disk Duplexing is a fault tolerant disk technology supported by Microsoft Windows NT Server.

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What is Disk Duplexing?

A fault tolerant disk technology supported by Microsoft Windows NT Server. Disk duplexing is essentially the same as disk mirroring, except that a separate disk drive controller is used for each mirrored drive to provide additional fault tolerance.

This provides two levels of fault tolerance:

  • If one drive fails, the other contains a mirrored copy of the data.
  • If one controller fails, the other controller continues to function.

You can establish disk duplexing on Windows NT systems at the partition level. In terms of system recovery and management, there is no difference between disk mirroring and disk duplexing.