Splitting a mirrored aggregate

• You want to stop mirroring an aggregate.
• You want to move a mirrored aggregate to another location.
• You want to modify the mirrored aggregate, and test the modification before applying it. You can apply and test the modifications on the split-off copy of the plex, then apply those changes to the untouched original plex.

Before splitting, a mirrored aggregate or traditional volume has two plexes, plex0 and plex1. After splitting, the new unmirrored aggregate with the new name has one plex, plex0. The new unmirrored aggregate with the original name also has one plex, either plex0 or plex1.

The plex name for an unmirrored aggregate is unimportant because the aggregate has only one plex. If you use SyncMirror to mirror one of these unmirrored aggregates, the resulting plex names will always be plex0 and plex1.