state active WWPN 100000051E0F81CC node_logged_in_count 0 state offline IBM_2145:ITSO_DH8_B:superuser> lsfabric -host Win2K8 remote_wwpn remote_nportid id node_name local_wwpn local_port  local_nportid state name cluster_name type 100000051E0F81CD 021800 1 node1 500507680C220416 2 020400 active Win2K8 host 100000051E0F81CD 021800 2 node2 500507680C22041D 2 020000 active Win2K8 host GLYPH<SM590000> lshostvdiskmap GLYPH<SM590000> lsfabric -host <host_id_or_name> GLYPH<SM590000> Any special software that you are using GLYPH<SM590000> Any recent change in the OS, such as patching the OS, an upgrade, and so on GLYPH<SM590000> Operating system version and maintenance or service pack level GLYPH<SM590000> Multipathing type and driver level GLYPH<SM590000> Host bus adapter model, firmware, and driver level GLYPH<SM590000> Host bus adapter connectivity issues Check that all volumes are mapped to the correct hosts. If a volume is not mapped  correctly, create the necessary host mapping. Use this command with parameter  -host <host_id_or_name>  to display Fibre Channel  (FC) connectivity between nodes and hosts. Example 10-3 shows the  lsfabric -host  <host_id_or_name>  command output. To perform troubleshooting on the host side, check the following: Based on this list, the host administrator must check and correct any problems. For more information about managing hosts on IBM Spectrum Virtualize, see Chapter 6,  “Hosts” on page 279. Introducing IBM Spectrum Virtualize into your SAN environment and the use of its  virtualization functions are not difficult tasks. However, before you can use IBM Spectrum  Virtualize in your environment, you must follow some basic rules. These rules are not  complicated, but you can make mistakes that lead to accessibility issues or a reduction in the  performance experienced. Two types of SAN zones are needed to run IBM Spectrum Virtualize in your environment: A  host  zone  and a  storage zone . In addition, you must have an IBM Spectrum Virtualize zone that  contains all of the IBM Spectrum Virtualize node ports of the IBM Spectrum Virtualize cluster.  This IBM Spectrum Virtualize zone enables intracluster communication. For more information  and important points about setting up IBM Spectrum Virtualize in a SAN fabric environment,  see Chapter 1, “Storage area network” on page 1. Because IBM Spectrum Virtualize is in the middle of the SAN and connects the host to the  storage subsystem, check and monitor the SAN fabrics. Chapter 10. Troubleshooting and diagnostics  439 10.3.2 SAN events Example 10-3 The lsfabric -host <host_id_or_name> command