Compaq DWZZH manual Swcc and UltraSCSI Hubs, Agents and Storage

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SWCC and UltraSCSI Hubs

This chapter is intended to provide you with important information regarding the use of StorageWorks Command Console on SCSI buses that have an UltraSCSI Hub. While the information provided here is important, it is essential that you have read the SWCC Manual and Release Notes.

3.1Agents and Storage

It is highly recommended that you only run one SWCC agent on one of the servers that can access a particular storage subsystem behind the DS-DWZZH-05 UltraSCSI Hub. Using SWCC through the client-agent model is very similar to using a serial terminal to access the HSZ70 controller; running multiple agents to access one storage subsystem would show up as multiple storage windows on the SWCC-Client machine. This could be a potential problem, as the Client would see multiple HSZ70 subsystems, when in fact, only one exists, but is being displayed multiple times.

NOTE

If you have multiple storage subsystems behind the DWZZH UltraSCSI Hub, be sure to name each of your storage subsystems uniquely and carefully (when you configure SWCC) so that you can distinguish between them easily.

The SWCC Graphical User Interface (GUI) neither displays when HSZ access ID restriction is being enforced nor prevents changes to restricted configurations from the GUI. For example, consider having four servers, each with a uniquely identified Host Bus Adapter attached to a DWZZH 5-port UltraSCSI Hub, connected to an RA7000 subsystem (Figure 3–1). Furthermore, consider the case where you have access ID restrictions configured such that each SCSI ID 12-15 could access a unique set of six disks in the storage cabinet.

EK–DWZZH–UG. D01 3–1