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EK–SMDZS–UG. B01 5–1
5
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.
5.1 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-09
UltraSCSI Hub. Using SWCC through the client-agent model is very similar to
using a serial terminal to access the HSZ-70 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 HSZ-70 subsystems, when in fact, only one exists, but is
being displayed multiple times.
NOTE
If you have multiple storage subsystems behind
the DS-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 DS-DWZZH 5-port UltraSCSI Hub,
connected to a RA 7000 Subsystem with 24 disks (see Figure 5–1). 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.