StorageWorks Solutions DWZZx-Series SCSI Bus Converters User's Guide

This document, the "StorageWorks Solutions DWZZx-Series SCSI Bus Converters User's Guide," provides information for configuring, installing, and maintaining Digital Equipment Corporation's 8-bit and 16-bit Small Computer System Interface (SCSI) bus converters.

The primary purpose of the DWZZx-series converters (DWZZA and DWZZB) is to establish compatibility between typically incompatible differential and single-ended SCSI buses, such as those found in StorageWorks BA350 (8-bit) and BA356 (16-bit) shelf systems. They also extend the effective length of the SCSI bus by converting between these physical bus types to form a single "logical bus" that is transparent to SCSI devices.

Key distinctions between the series:

• DWZZA-series: Designed for 8-bit SCSI applications (e.g., BA350 shelves), operating 16-bit differential host buses in 8-bit mode and supporting data transfers up to 10 MB/s. Models include DWZZA-AA (desktop) and DWZZA-VA (shelf-mounted).
• DWZZB-series: Designed for 16-bit SCSI applications (e.g., BA356 shelves), operating 16-bit differential host buses in either 8-bit or 16-bit mode and supporting data transfers up to 20 MB/s. Models include DWZZB-AA (desktop) and DWZZB-VW (shelf-mounted).

The guide covers component descriptions, features, functions, SCSI cable requirements, and detailed termination procedures for both end-bus and mid-bus configurations.