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Fault Tolerance
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Mirroring
In This Chapter
Mirroring
Benefits of Mirroring
Costs of Mirroring
Consequences of Not Mirroring
Data to Mirror
Alternatives to Mirroring
Logical Volume Managers
Hardware Mirroring
Mirroring Process
Creation of a Mirror Chunk
Mirror Status Flags
Recovery
Actions During Processing
Disk Writes to Mirror Chunks
Disk Reads from Mirror Chunks
Detection of Media Failures
Chunk Recovery
Result of Stopping Mirroring
Structure of a Mirror Chunk
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