Administrator Guide

Table 14. Front-End I/O Ports Failover Behavior (continued)
Scenario Virtual Port Mode Legacy Mode ALUA Port Mode
A controller fails in a
dual-controller Storage
Center
Virtual ports on the failed
controller move to physical
ports on the functioning
controller.
Primary ports on the failed
controller fail over to reserved
ports on the functioning
controller.
Active/Optimized ports on the
failed controller fail over to
the Standby ports on the
functioning controller.
A single port fails
(single- or dual-controller
Storage Center)
1
An individual port fails over
to another port on the same
controller in the same fault
domain.
The port does not fail over
because there was no controller
failure. If a second path is
available, MPIO software on the
server provides fault tolerance.
The port fails over to the
Standby port on the functioning
controller.
NOTE:
1
To support port level failover, a controller must have at least two ports in the same fault domain using the same
transport media, such as FC or iSCSI.
Rebalance Front-End Ports
If a controller has been restarted, front-end ports can become unbalanced. If front-end ports are unbalanced, a message at the
top of the Summary tab prompts you to rebalance the ports.
About this task
NOTE:
Front-end ports are automatically rebalanced when using SCv2000 and SCv3000 series controllers. Manual port
rebalance is not necessary.
Steps
1. If the Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.
2. Click the Summary tab.
3. Click Rebalance Ports in the banner message.
A Rebalance Ports dialog box is displayed, which shows the progress of the rebalance operation.
Managing Front-End I/O Port Hardware
Front-end FC and iSCSI ports can be renamed and monitored with threshold definitions. iSCSI ports can be assigned network
configuration and tested for network connectivity.
For a Storage Center in virtual port mode, the Hardware tab displays a virtual port for each physical port. For physical ports,
the physical identity, speed, and hardware are given. For virtual ports, the current and preferred physical ports are shown.
NOTE: For user interface reference information, click Help.
Rename a Front-End I/O Port
Set a display name for a physical or virtual I/O port to make it more identifiable.
Steps
1. If the Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.
2. Click the Storage tab.
3. In the Storage tab navigation pane, select Fault Domains, then click the Front End Ports subtab.
4. Double-click the desired I/O port.
The Hardware tab for the I/O port opens.
5. Click Edit Settings.
The Edit Controller Port Settings dialog box opens.
6. In the Name field, type a descriptive name for the I/O port.
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Storage Center Maintenance