BA350-SA Modular Storage Shelf User's Guide

This "BA350-SA Modular Storage Shelf User's Guide" provides comprehensive information on the BA350-SA storage shelf, focusing on its configuration and maintenance.

Key areas covered include:

• Shelf Description: Details the physical layout of the BA350-SA, including its eight System Building Block (SBB) slots, specific roles for slots (e.g., primary power supply in slot 7, redundant power or Battery Backup Unit in slot 6), and compatible DECstor/me products.
• Shelf Status: Explains how to monitor the shelf's operational status through Power Supply LEDs (indicating proper function, overtemperature, or failure) and the SHELF_OK signal, which can be configured for host/controller reporting.
• Configuration Rules: Provides specific guidelines for power supply installation, SBB placement (considering physical size and bus configuration), and device addressing. Device addresses are typically determined by the SBB's physical slot, but can be manually set for some SBBs using a six-bit address switch. These configuration rules are noted to take precedence over other documentation.
• SCSI Bus Configuration: Offers detailed procedures for setting up the shelf for a single SCSI bus, two independent SCSI buses, or configuring multiple BA350-SA shelves to operate on a single SCSI bus, including instructions for installing terminator and jumper boards.
• Maintenance Procedures: Outlines methods for replacing SBBs (hot, warm, and cold swap, with warnings about electrostatic discharge) and provides step-by-step instructions for replacing blowers, emphasizing safety precautions due to electrical hazards and the risk of overheating.

The manual is intended for personnel involved in configuring, using, and installing BA350 DECstor/me modular storage shelf subsystems.