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Storage : Aggregates : Understanding aggregates : What SyncMirror is
What SyncMirror is
SyncMirror is an optional feature of Data ONTAP. It is used to mirror data to two separate aggregates. It allows for real-time mirroring of data to matching aggregates physically connected to the same storage system.
SyncMirror provides for synchronous mirroring of data, implemented at the RAID level. You can use SyncMirror to create aggregates that consist of two copies of the same WAFL file system. The two copies, known as plexes, are simultaneously updated. Therefore, the copies are always identical. The two plexes are directly connected to the same system.
The following provides information about the activities of SyncMirror:
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SyncMirror can be used to mirror aggregates and traditional volumes. (A traditional volume is essentially an aggregate with a single volume that spans the entire aggregate.)
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SyncMirror cannot be used to mirror FlexVol volumes. However, FlexVol volumes can be mirrored as part of an aggregate.
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SyncMirror is different from synchronous SnapMirror.
For more information about aggregates and volumes, see the Data ONTAP Storage Management Guide for 7-Mode.
Related Link:  
Data ONTAP Information Library page: support.netapp.com//documentation/productsatoz/index.html

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