Administrator Guide

9. Configure the LUN settings:
● To specify a specific LUN number, clear the Use next available LUN checkbox, then type the LUN in the LUN to use
when mapping to Volume field.
● To assign the next unused LUN for the server, select the Use next available LUN checkbox.
● To make the volume bootable, select the Map volume using LUN 0 checkbox.
10. Click OK.
Specify Which Controller Processes IO for a Volume/Server Mapping
For dual-controller Storage Centers, you can manually specify which controller processes IO for a volume/server mapping. By
default, the Storage Center automatically chooses a controller.
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 the volume.
4. In the right pane, click the Mappings tab.
5. In the right pane, select the server for which you want to modify mapping settings, then click Edit Settings. The Edit
Settings wizard appears.
6. Click Continue. The wizard advances to the next page.
7. Clear the Allow the Storage Center to automatically determine the best Controller to activate Volume on check
box.
8. From the Activate Volume on Controller drop-down menu, select the controller that should process IO for the volume/
server mapping.
9. When you are finished, click OK.
Limit the Number of Paths That Can Be Used for a Volume/Server Mapping
You can specify the maximum number of paths used by servers that support multipath I/O.
Steps
1. If the Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.
2. In the Storage tab navigation pane, select the volume.
3. In the right pane, click the Mappings tab.
4. In the right pane, select the server for which you want to modify mapping settings, then click Edit Settings.
The Edit Settings wizard opens.
5. Click Continue. The wizard advances to the next page.
6. Use the arrows next to the Maximum number of paths per Server field to increase or decrease the path limit.
7. Click OK.
Change a Volume/Server Mapping to Read-Only
To prevent a server from writing to a volume, change the volume/server mapping to read-only.
Steps
1. If the Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.
2. In the Storage tab navigation pane, select the volume.
3. In the right pane, click the Mappings tab.
4. In the right pane, select the server for which you want to modify mapping settings, then click Edit Settings.
The Edit Settings wizard opens.
5. Click Continue. The wizard advances to the next page.
6. Select the The volume should be presented as read-only to the server checkbox.
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Storage Center Administration