Mapping Virtual Volumes to Application Servers
Mapping a virtual volume to an application server effectively connects the virtual storage resource to the host application server. To the application servers, the virtual volumes mapped from the SANsymphony storage servers appear as directly attached disks.
You can only map virtual volumes to application servers that have I/O channels configured. (Refer to Assigning Channels to Application Servers, if necessary.)
If you are mapping the same virtual volume to multiple application servers, please refer to LUN Numbering Consistency for special instructions before proceeding.
Follow these steps to map one or more virtual volumes to an application server:
- In the SAN Mappings tab of SANmanager, open the App Servers folder in the lower-left pane. Identify the I/O channel to use.
- In the top pane, select one or more virtual volumes to map.
- Drag the virtual volumes onto the channel of the application server or drag it to the application server name. If you are mapping multiple virtual volumes to the application server, drag the virtual volumes to the name, this will automatically distribute virtual volumes across all the channels.
- Apply the configuration.
Your application servers should now be able to discover, mount, format, and access the storage server-presented virtual volumes using the operating system software on your application servers.
Until the virtual volume has been discovered by the application server, the Diagnostic column may display “Topological Error.” Once the virtual volume has been discovered by the application server, the Diagnostic column will be empty. Depending on the operating system, if I/O stops, the topological warning may return. This is because the application server may have logged out because it is not running I/O on the mapped virtual volume, and is normal behavior.
To view the status of the mapping path in the SANsymphony software, refer to SANcentral Status tab. You can change a mapping path in the SANmanager Virtual Volume Properties dialog box.