A newly added storage disk is not automatically recognized. You must manually add the virtual or the physical disk. You need to use the xsigo-scan -r -a command in the Oracle VM server. This command is required only in some situations and not all.
On storage, if the LUN is already created and associated with the vHBA WWPN before adding the vHBA on the Oracle Fabric Interconnect, then the target is already visible on the Oracle Fabric Interconnect as the vHBA comes up. In this situation, the xsigo-scan -r -a command is not required.
If the vHBA is created on the Oracle Fabric Interconnect first, and then the LUN is created on storage and mapped to the vHBA, the target is not already visible. In this situation, the xsigo-scan -r -a command is required to make the LUN visible to Oracle VM hosts.
Regardless of whether the LUN is configured before or after the vHBA is added to the Oracle Fabric Interconnect, anytime LUN masking is enabled to the vHBA, the xsigo-scan -r -a command is required to make the LUN visible to the Oracle VM hosts.