BA350-EA Modular Storage Shelf User's Guide

This user guide describes the BA350-EA Modular Storage Shelf, detailing its configuration, installation, and maintenance within a DECstor/me modular storage system.

The document covers:

• Shelf Description: An overview of the BA350-EA as a double-height modular storage shelf capable of accommodating HSx-series controllers, System Building Blocks (SBBs - disk drives, tape drives, etc.), and an adapter. It explains the power supply requirements (one for each section, primary in slot 7) and how SCSI addresses relate to physical slot numbers (not always directly, with slots 0 and 6 sharing SCSI address 0).
• Configuration Rules: Guidelines for setting up power, installing SBBs (considering physical size and bus configuration), and assigning SCSI device addresses, noting the use of physical location or address switches on SBBs.
• SCSI Bus Configurations: Detailed factory configurations (e.g., 5x1, 5x2, up to 5x6) for the shelf when using an HSZ10-AX controller, including the necessary terminators, jumpers, and SBB placements. It highlights the six single-ended SCSI bus connectors and the need to remove blowers for bus configuration.
• DWZZA-VA Bus Adapter: A dedicated section explaining this adapter's role in providing compatibility between 16-bit differential and 8-bit single-ended SCSI buses. It describes its major features, SCSI cable types, termination procedures, and disassembly instructions.
• Shelf Status and Replacement Procedures: Information on monitoring shelf status via power supply LEDs and the SHELF_OK signal. It provides step-by-step procedures for replacing SBBs (using hot, warm, or cold swap methods) and blowers, emphasizing safety warnings regarding electrical hazards and electrostatic discharge (ESD).