Disconnecting the Core from the Edge
1. From the Core Management Console, choose Configure > Manage: LUNs and disconnect and offline all remote LUNs associated with the Edge that require removal from the Core. Local LUNs can remain online and the local Edge will take them over (they can no longer be reformatted or resized, though, because the Edge can only create or reformat a single local LUN).
Initiators and initiator groups mapped to local LUNs are preserved and will not see any disruption when the Core is disconnected.
2. From the Edge Management Console, choose Storage > Storage Edge Configuration.
3. Click Remove Core. The system prompts you to confirm the Core disconnection and asks whether you want to preserve the local iSCSI storage configuration.
4. From the Core Management Console, choose Configure > Manage: LUNs. Delete any Edge Local LUNs that were previously associated with the Edge where the Core was removed. Do not perform this step before the Core is removed from the Edge Management Console.
5. Remove the Edge from the Core. After configuring Core, the page displays useful information about your Core configuration.