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. You need a SyncMirror license to install the SyncMirror feature.

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.

•	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.)

•	SyncMirror cannot be used to mirror FlexVol volumes. However, FlexVol volumes can be mirrored as part of an aggregate.

•	SyncMirror is different from synchronous SnapMirror.

For more information about aggregates and volumes, see the Data ONTAP 7-ModeStorage Management Guide.