It is possible to define multiple network server descriptions (NWSDs) to control the hardware of a particular Integrated xSeries® Server (IXS), xSeries system, or IBM® BladeCenter™ blade. For non-iSCSI attached servers, these NWSDs must be in the same iSeries™ partition. However, for iSCSI attached servers, these NWSDs can be defined on the same iSeries partition, another partition in the same iSeries system, or on an entirely different iSeries system. For example, you may have an NWSD defined to use an xSeries system for production work during normal business hours and another NWSD defined to use the same xSeries system at other times.
Only one NWSD can use a particular piece of server hardware at any point in time. Therefore, if there are multiple NWSDs defined to run on the same hardware and one of them is currently using it, the others are not allowed to start until the NWSD that is currently using the hardware is shut down (varied off . This protects against one NWSD inadvertently taking over the hardware that is being used by another NWSD.
If you are having problems starting an NWSD and the server hardware is currently being used by another NWSD, then the correct way to transfer control of the hardware from one NWSD to another NWSD is to first shut down the NWSD that is currently using the hardware and then start the NWSD that needs to use the hardware next.
