Adaptec 5325302057 User Guide - Page 76

Backing Up Your Data with Mirrored Volumes A dedicated link between the volume and its mirror is required, to support the continual synchronization. File Server Active access to volume Appliance A Net 1 Stand-by access to volume Net 1 Appliance B iSCSI iSCSI Net 2 (Mirror IO) Volume XYZ (original volume) Mirror Manager Synchronization Volume XYZ-1 (mirror of volume) Mirror Plex Mirror Managers and Mirror Plexes The 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 Storage Appliances. Data is written to the mirror manager first; then, the mirror plex is synchronized with the mirror manager. If required, you can change the priority of the mirror plex so that it becomes the mirror manager, and vice versa. See "Changing Mirror Priorities" on page 72 for instructions. Once a mirrored volume is created, you can use Adaptec Storage Manager to manage 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). 70 Snap Server 700i Series User's Guide