HP StorageWorks Storage Mirroring evaluation guide (T2558-96075, February 2008)

7 - 9
Configuring failover
If you are interested in continuing your evaluation to test high availability, use the remaining instructions in this chapter to
configure failover, simulate a failure, and perform failback and a restoration.
1. The Failover Control Center can be started from within the Management Console or from the Windows desktop.
 From the Management Console, select Tools, Failover Control Center.
 From the Windows desktop, select Start, Programs, Storage Mirroring, Failover Control Center.
2. Select a failover target from the Target Machine list box.
3. Click Login to login to the selected target.
4. Select a source machine to monitor by clicking Add Monitor. The Insert Source Machine dialog box appears in front of
the Monitor Settings dialog box.
5. Type in your source machine name and click OK. The Monitor Settings dialog box appears. This is where you set your
monitoring configuration.
6. Select the source to be monitored by marking the check box to the left of the source server name in the Names to
Monitor
tree.
7. By default, Failover Hostname is disabled. This option automatically removes the host SPN (Service Principle Name)
from Active Directory on the source and adds it to Active Directory on the target. If you are using Active Directory,
enable this option or you may experience problems with failover.
8. Failback Hostname returns the host SPN on the source and target back to their original settings on failback. If you are
using Active Directory, enable this option or you may experience problems with failback.
9. If you are failing over or failing back hostnames, you need to specify an Active Directory user that has update privileges
within Active Directory. Click Credentials and identify a user and the associated password that has privileges to create
and delete SPNs. The username must be in the format
fully_qualified_domain\user. Click OK to return to the
Monitor Settings dialog box.
At this point, in terms of your evaluation, your failover configuration is complete because you will be using the default settings
for the remaining options. But while you are viewing the Monitor Settings dialog box, notice the flexible configuration options
available to you. The following diagram points out the key features of the Monitor Settings dialog box.
NOTE: The Active Directory account password cannot be blank.
Target machine information including
the NIC which will assume the failover
traffic, the monitorin
g
method, and the IP
Source machine and its IP addresses.
Some of the failover settings are
source specific and some can be
set individually for
each IP address
Settings to configure
the length of time
before failover occurs
Allows you to
insert other
machines or
Multiple settings
allow you to
determine when
and how failover
Active Directory
Scripting allows
you to automate
processes and
User intervention
to give you more
control over the
Share failover, if
will occur
failover process
desired
Setting to
determine how
to apply the target
data at failover
configuration
make failback
seamless
specify an IP
address instead
of a machine name
addresses assigned
to that NIC.
on the source.