Send the rescan command and check the LUN count update:# echo "- - -" > /sys/class/scsi_host/host2/scan Display HBA and SCSI details using systool: To examine some simple information about the Fibre Channel HBAs in a unit: # systool -c fc_host –v To look at verbose information regarding the SCSI adapters present on a system: # systool -c scsi_host –v To see what Fibre Channel devices are connected to the Fibre Channel HBA cards: # systool -c fc_remote_ports -v –d For Fibre Channel transport information: # systool -c fc_transport –v For information on SCSI disks connected to a system: # systool -c scsi_disk –v To examine more disk information including which hosts are connected to which disks: # systool -b scsi –v Use the sg_map command to view more information about the SCSI map: # sg_map –x To obtain driver information, including version numbers and active parameters: For Qlogic HBAs: # systool -m qla2xxx –v For Emulex HBAs: # systool -m lpfc –v |