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The Mirror Disk DR resource enables replicate a mirror disk set of a cluster to an off-site node DR for the disaster recovery purpose.
Mirror Disk DR agent act according to mirror disk status and role.
Dynamic information like status and roll of Mirror Disk DR is logged into system event log, this is sent to MCCS by MCCS Event Module.
MCCS Event Module is activated when MCCS service starts.
Data replication component operates by creating mirror set for volumes between two nodes.
Source volume is sit on Primary node, Target volume is sit on Secondary node in a cluster and also off-site DR node.
Client is only available to read/write in the source volume, changed block of the volume is replicated to the target volume through the TCP/IP network connection. At this point, target volume is in lock state and read/write is not allowed. This is to ensure data integrity by preventing the use of target volume.
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[Figure] Mirroring Configuration
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