Definition

Mirror Mode (VMware Mirror Mode)

Contributor(s): Nick Martin

Mirror Mode is a backup feature that replaced Changed Block Tracking in VMware vSphere 5.0 as the mechanism for tracking changes and confirming Storage vMotions

Instead of keeping track of blocks that were copied during a migration process and then applying those changes to the destination disk, Mirror Mode copies (or mirrors) every I/O write from the source to destination disk while the migration is taking place. This helps reduce Storage vMotion time, because it eliminates the step of copying the changes to the destination disk once the rest of the disk has been migrated.

This was last updated in September 2014

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