Virtual Hotplugging without reboot
if you attach some virtual resurces(for example a new disk in vmware) to a linux host, normally a reboot is required. with the following command a rescan of the pcibus is done and you don't need to reboot your system.
echo 1 > /sys/bus/pci/rescan
now you are able to see the new harddisk or networkcard:
for your networkcard
now you are able to partitioning your harddisk as usual or expand your LVM