Administrator Guide

Change the LUN Used by a Volume/Server Mapping
The logical unit number identifies the volume to the server operating system.
Steps
1. If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane of Unisphere
Central.
2. From the STORAGE menu, click Volumes.
The Volumes view is displayed.
3. In the Volumes view, select the volume you want to modify.
4. Click the Mappings tab.
5. Select the server for which you want to modify mapping settings, then click (Edit).
The Edit Volume Mapping Settings dialog box opens.
6. 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.
7. 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 you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane of Unisphere
Central.
2.
From the STORAGE menu, click Volumes.
The Volumes view is displayed.
3. In the Volumes view, select the volume you want to modify.
4. Click the Mappings tab.
5. Select the server for which you want to modify mapping settings, then click (Edit).
The Edit Volume Mapping Settings dialog box opens.
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 you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane of Unisphere
Central.
2.
From the STORAGE menu, click Volumes.
The Volumes view is displayed.
3. On the Volumes view, select the volume you want to modify.
4. Click the Mappings tab.
5. Select the server for which you want to modify mapping settings, then click (Edit).
The Edit Volume Mapping Settings dialog box opens.
6. Select the The volume should be presented as read-only to the server checkbox.
7. Click OK.
Storage Center Administration
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