Compaq EK-ASIP2-OG. D01 - Manual (Page 18)

Product Overview
1–8 AlphaServer Intelligent Peripheral Platform Hardware Owner's Guide
1.4.2 Modular Storage Shelf Subsystem (BA35x-Sx)
This section provides a brief description of the modular storage shelf subsystem.
1.4.2.1 Overview
The StorageWorks disk drive subsystem is a rackmount storage resource provided to solution
developers and service developers creating applications on the AlphaServer IP Platform. The
shelves are contained in a separate chassis that provides a flexible capacity for adding and
hot-swapping disks.
The shelf is a self-contained unit with embedded backplane routing with two SCSI buses. It
can be configured for maximum connectivity (1 SCSI bus) or for maximum performance (2
SCSI buses).
Each StorageWorks modular storage shelf houses all the application storage disks in a
rackmount shelf. The following table lists the type of disks that can be used. For additional
information, see the BA350 Modular Storage Shelf Subsystem Configuration Guide.
1.4.2.2 Modular Storage Shelf Optional Hardware
Table 1-2 lists the hardware options for the BA35x-Sx modular storage shelf.
Table 1-2: Modular Storage Shelf (BA35x-Sx) Optional Hardware
Part Number Description
BA35x-Sx Rackmount StorageWorks in BA35x-Sx enclosure.
DS-RZ1CF-VW StorageWorks disks for BA35x enclosure. 4.3 GB disks.
DWZZB-VW Fast, wide, differential to single ended SCSI converter for BA35x-Sx.
Terminates SCSI bus at storage unit.
KZPSA-BB Fast, wide, differential SCSI controller.
H885-AA Tri-link connector block.
H879-AA SCSI terminator.
1.4.3 ISA Bus Expansion Chassis
This section describes the ISA bus expansion chassis.
1.4.3.1 Overview
The I-Bus 4820-2819 enclosure is used as a 20-slot ISA bus expansion chassis for the
AlphaServer 1000A system. The ISA bus expansion chassis contains all Dialogic voice
modules for its associated AlphaServer 1000A simplex and duplex systems. The I-Bus 4820-
2819 enclosure contains an alarm sensor module which monitors temperature, dc power, and
cooling fan rotation. If any of these reach a point of failure, an alarm signal is sent to the
AlphaServer 1000A.
The ISA bus expansion chassis connects to the AlphaServer 1000A system as follows:
•
The ISA bus expansion chassis connects to the AlphaServer 1000A EISA bus by means
of the AT (ISA) bus expansion kit (PN 2T-VC220-IP).
•
The ISA bus expansion chassis alarm inputs connect to the AlphaServer 1000A system
by means of a cable.