User`s guide

Introduction to the SW300 Enclosure

This chapter describes the SW300-series redundant array of independent disks

(RAID) enclosure including the unit layout, dimensions, and the small computer

system interface 2 (SCSI–2) connections (ports) for StorageWorks building block

(SBB) shelves.

Note

The SW300 enclosure contains up to two HS array controllers. This

manual contains only the removal and replacement procedures for the HS

array controllers. Controller descriptions, operation, and diagnostics are

provided in the speciﬁc controller documentation.

1.1 Overview

The SW300 enclosure, as shown in Figure 1–1, is a member of Digital’s

StorageWorks family of modular enclosures. This enclosure can accommodate

both data storage and controller combinations. The SW300 enclosure has the

following capabilities:

• StorageWorks compatible

• Provides packaging for the following components:

24 3½-inch SBBs, 8 5¼-inch SBBs, or mixed combinations

8 power supplies

8 dual speed blowers

2 environmental monitor units (EMUs)

2 ac power entry controllers

2 controllers

2 cache modules

6 single-ended SCSI buses

• Redundant shelf power supplies

• Redundant EMUs

• Redundant ac power entry controllers

• Hot/warm swap of all ﬁeld replaceable units (FRUs)

• Compatible with the High Availability Storage Subsystem Fault Bus

• Optimized for four devices per SCSI bus

Introduction to the SW300 Enclosure 1–1