Backing Up Your Data with Mirrored Volumes70 Snap Server 700i Series User’s GuideA dedicated link between the volume and its mirror is required, to support thecontinual synchronization.Mirror Managers and Mirror PlexesThe original volume is called the mirror manager; its mirror is called the mirror plex.The mirror plex must have a name that’s unique across both iSCSI StorageAppliances. Data is written to the mirror manager first; then, the mirror plex issynchronized with the mirror manager.If required, you can change the priority of the mirror plex so that it becomes themirror manager, and vice versa. See “Changing Mirror Priorities” on page 72 forinstructions.Once a mirrored volume is created, you can use Adaptec Storage Manager tomanage it. This section describes how to:• Create a mirrored volume (see page 71).• Extend a mirrored volume (see page 72).• Change mirror priorities (see page 72).• Force a failover on a mirrored volume (see page 73).• Fail back a mirrored volume (see page 73).• Break a mirrored volume (see page 74).• Delete a mirrored volume (see page 75).iSCSIiSCSIAppliance AFile ServerNet 1 Net 1Net 2Appliance BVolume XYZ(original volume)Mirror ManagerVolume XYZ-1(mirror of volume)Mirror PlexSynchronization(Mirror IO)Stand-by accessto volumeActive access tovolume
