Chapter 3: Basic System Operations
Converting to HA
70
StorNext M660 Metadata Appliance Hardware Guide
Caution:
Do not login to the GUI of the secondary MDC node at any
point during the upgrade/HA conversion process. System
configuration and licensing for the system could be
compromised.
• When you are able to log into the primary /node, after accepting the
EULA, the system will automatically display the
Tools > System
Control
page. Click the
Start
button to restart the Storage Manager
components.
• Wait until the system icons for both MDC nodes of the system as
well as File System and Storage Manager are green, which indicates
normal operation.
Post-Conversion Steps
If you are using the DDM feature, do the following:
• If you use the secondary MDC node as a DDM mover, make sure the
file systems are mounted.
Initiating a Graceful System Failover
During StorNext 5 release 5.0 or later upgrades, the Metadata Appliance
fails over once. Because of this single failover, the MDC node originally
operating as primary is set as the secondary after the upgrade. This
procedure provides the steps necessary to set the MDC nodes back to
the system state prior to the upgrade for this scenario.
To initiate the failover of a Metadata Appliance after converting to HA or
any time a failover is desired:
1
Open an SSH connection to the MDC node operating as the
primary
.
2
Login to the command line of the
primary
MDC node.
• User:
stornext
• Password: (the customer should have the password for the
stornext
account)
3
Type
sudo rootsh
to gain root user access.
4
Enter the password a second time.
