Compaq DWZZH - Manual (Page 27)

EK–DWZZH–UG. D01 3–1
3
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.
3.1 Agents 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.