VMware vCenter Site Recovery Manager 4.1.x
VMware vCenter Site Recovery Manager 5.0.x
VMware vSphere ESXi 5.0
VMware vCenter Site Recovery Manager 4.0.x
VMware vCenter Site Recovery Manager 5.1.x
VMware vSphere ESXi 5.1
Read only LUNs are typically used for replication purpose and are commonly seen in vCenter Site Recovery Manager (SRM) environments. In a production environment, ESX/ESXi hosts heartbeat all available VMFS volumes, which fails on the read only VMFS LUNs.
In the Add storage wizard, the ESX/ESXi hosts query all available storage to see the devices that are available. If there are read only LUNs that are in a read only state, the scan for available devices take a longer time than expected.