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===== LUN (Logical Unit Number) =====

==== Recognise a "LUN" in a running system ====

=== VMWARE ===

A „LUN“ (or virtual Disk) can be recognised in VMware with the following command:
  
  echo "- - -" > /sys/class/scsi_host/host1/scan

"host1” represents the controller ID.

=== Physical Machine ===

For QLogic-Fibrechannel-Devices (qla2xxx):

  echo „scsi-qlascan“ > /proc/scsi/qla2xxx/0
or 
  echo „scsi-qlascan“ > /proc/scsi/qla2xxx/1

“0” and “1” represents the fibrechannel controler ID.

For other devices:

  echo „scsi add-single-device 0 0 0 3“ > /proc/scsi/scsi

If HP PSP has been installed:

  hp_rescan –a
  
=== Reload Kernel Partitiontable ===

  sfdisk -R /dev/XXX