Can you post a screenshot of what you are seeing? Are you monitoring the NAS/SAN devices to which these LUNs are attached? Can you post a screenshot of the main console for that SAN?
The pictures are as follows SAN console, one of the Oracle VM hosts (Linux box) and a Windows server. The Windows server has drives F and E attached directly from the SAN while on the Linux server the directly attached LUN is mounted on the path /OVS/Repositories/004xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.
The LUNs show up fine on the Windows servers but not one the Linux box. When I check under the Performance tab for the Linux server and select disk I can see all the disk devices, however I am unable to see their mount points in the Storage tab.