Administrator Guide

The Fault Domain view is displayed.
5. On the Summary tab, click (More Actions) and select Configure CHAP.
The Configure CHAP dialog box opens.
6. In the Remote CHAP Configuration table, select a CHAP configuration, then click Remove.
The CHAP configuration is removed from the table.
7. Click OK.
Enable Bidirectional CHAP for iSCSI Replication in a Fault Domain
When bidirectional CHAP is enabled for iSCSI replication, the source Storage Center (initiator) challenges the destination Storage Center
(target) for a shared secret.
Prerequisites
CHAP must be enabled for the fault domain.
Steps
1. If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane of Unisphere
Central.
2. From the SYSTEM menu, click Ports.
The Ports view is displayed.
3. Click the Front End Ports tab.
4. Expand iSCSI and click the fault domain link.
The Fault Domain view is displayed.
5. On the Summary tab, click (More Actions) and select Configure CHAP.
The Configure CHAP dialog box opens.
6. Type a shared secret in the Bidirectional CHAP Secret field.
Grouping SAS I/O Ports Using Fault Domains
Front-end ports are categorized into fault domains that identify allowed port movement when a controller reboots or a port fails. Ports
that belong to the same fault domain can fail over to each other because they have connectivity to the same resources.
NOTE:
Fault domains cannot be added or modified on SCv2000 or SCv3000 series storage systems. Storage Center
creates and manages fault domains on these systems.
Create a SAS Fault Domain
Create a SAS fault domain to group SAS front-end ports for failover purposes on SC4020 or SC5020 controllers.
Steps
1. If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane of Unisphere
Central.
2. From the SYSTEM menu, click Ports.
The Ports view is displayed.
3. Click (New) and select Create SAS Fault Domain.
The Create SAS Fault Domain dialog box opens.
4. In the Name field, type a name for the fault domain.
5. In the Ports table, select the SAS ports to add to the fault domain.
When pairing SAS ports into the fault domain:
• Use one port from each controller.
• Make sure the paired ports have the same port number and are connected to the same server.
6. Click OK.
Storage Center Maintenance
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