Technical data

The RA3000 storage subsystem has fully redundant components to eliminate
single points of failure. It comes with a standard uninterruptible power
supply (UPS) for cache data protection during power outages.
The RA3000 uses the dual-ported HSZ22 controller. Optional dual redundant
controllers with mirrored write-back cache provide maximum data integrity.
The StorageWorks Command Console (SWCC) V2.2 (or higher) client
graphical user interface (GUI) runs on a Microsoft Windows NT V4.0 Service
Pack 4 (or later) or Windows 2000 PC connected directly to the RA3000
by a serial line.
After the first virtual disk has been created, you can also communicate with
your RAID Array 3000 over a TCP/IP network provided the V2.2 (or higher)
SWCC Agent has been installed on the Tru64 UNIX member system.
The RA3000 is available as:
• DS-SWXRA-GH — A rackmount subsystem (standard RETMA or metric
cabinet) containing a controller shelf with one HSZ22 controller, an
uninterruptible power supply (UPS), two host I/O modules, a device I/O
module, and one 6-slot device expansion shelf. Up to three additional
expansion shelves (DS-SWXRA-GN) may be added to provide a maximum
of 24 storage devices.
• DS-SWXRA-GA — A deskside pedestal subsystem that includes one
HSZ22 controller. The base pedestal accommodates up to seven storage
devices. The included battery backup subsystem is a free-standing UPS.
An expansion pedestal option (DS-SWXRA-GD) increases the storage
capacity of the subsystem to 14 storage devices.
A second HSZ22 controller option (DS-HSZ22-AA) can be added to either
RA3000 subsystem.
To cable a RA3000 in a TruCluster Server configuration using a
DS-DWZZH-03 or DS-DWZZH-05 UltraSCSI hub, follow the steps in
Table 3–5.
______________________ Notes ______________________
All configuration illustrations assume that a second, redundant
HSZ22 controller is installed to achieve active/active or
active/passive failover.
See the RA3000 documentation for information about configuring
the storage devices.
Shared SCSI Bus Requirements and Configurations Using UltraSCSI Hardware 3–27