Discover new LUN with Qlogic HBA and create HDML device without reboot

As SAN admin give Sys admin new LUN(s) does not require reboot. For VMware ESX, use vSphere client and go to Configuration -> Storage Adapters -> Rescan...

In Linux (RHEL 5):

echo "scsi-qlascan" > /proc/scsi/qla2xxx/0

echo "scsi-qlascan" > /proc/scsi/qla2xxx/1

echo "- - -" > /sys/class/scsi_host/host0/scan

echo "- - -" > /sys/class/scsi_host/host1/scan

With HDLM from HDS, run command

dlmcfgmgr -r

:-)