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Order Number: EK-KZTSA-UG

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This document is an Installation and User's Guide for the Digital Equipment Corporation KZTSA SCSI Storage Adapter, identified by order number EK-KZTSA-UG.C01.

Overall Summary:

The KZTSA SCSI Storage Adapter is a high-performance TURBOchannel option module that serves as a pathway between a host system's TURBOchannel I/O bus and a 16-bit differential SCSI bus. It is designed to connect to various SCSI devices, including RAID subsystems, disks, and tapes, supporting both 16-bit and 8-bit differential SCSI devices directly. For compatibility with single-ended SCSI devices, a separate bus converter is required.

Key aspects covered in the guide include:

Adapter Overview:
- Purpose: Provides a high-performance link for mass-storage media, meeting demanding workstation and server I/O needs.
- Features: 16-bit wide differential SCSI bus, downline loadable firmware, onboard diagnostics, CAM/SIMport/TURBOchannel/SCSI-2 compliance, support for warm swapping SCSI devices (with a "Y" adapter).
- Physical Characteristics: Standard single-width TURBOchannel module with internal and external 68-pin SCSI p-connectors, status LEDs (Yellow: POST OK, Red: POST failed, Green: Terminator power OK), and user-configurable jumpers (e.g., for terminator power).
System Configurations:
- Installation Guidelines: Discusses host system constraints (workstation/server models and maximum adapter support) and emphasizes that only differential SCSI devices connect directly. If single-ended devices are used via a bus converter, the KZTSA adapter must be assigned a SCSI ID between 0 and 7.
- Differential SCSI Bus: Explains priority arbitration (SCSI ID 7 highest, ID 8 lowest) and different configurations:
  - Mid-bus: The KZTSA adapter is in the middle of the bus, requiring removal of onboard terminators and use of a "Y" cable or tri-link connector. Termination occurs at the end SCSI device.
  - End-bus: The KZTSA adapter is at the end of the bus, typically using its onboard terminators, with the other end terminated at the final SCSI device.
- Termination: Stresses the critical importance of proper termination at both ends of the SCSI bus to prevent data corruption. Termination can be active, supplied by the KZTSA (via jumper W3) or a SCSI device.
- Sample Configurations: Illustrates common setups, including connection to a bus converter for single-ended devices, integration into a RAID subsystem, and configurations for a DECsafe Available Server Environment (ASE) with dual hosts sharing SCSI devices (which requires internal termination to be removed from the KZTSA adapter and bus converter).
Installation and Verification:
- Installation Procedure: Step-by-step instructions covering unpacking, preparing the host system (shutdown, antistatic precautions), determining configuration/cabling, assigning SCSI IDs, inserting the adapter into a TURBOchannel slot, and connecting SCSI cables.
- Verification: Confirming proper installation by checking LED status indicators and verifying the KZTSA-AA subsystem appears in the host system's configuration display.
- Diagnostic Self-Tests and Console Commands (for Alpha AXP based systems):
  - t tc# testname: Runs diagnostic self-tests (pst-q for quick, pst-t for thorough).
  - CNFG: Displays KZTSA adapter information and lists connected SCSI devices for configuration verification.
  - DEVSELF: Invokes resident self-tests on connected SCSI devices.
  - SETID: Allows setting the KZTSA adapter's SCSI ID (default is 7).
  - BOOT: Initializes the host system and starts the operating system.
  - INIT: Performs a complete hardware reset of the adapter.
  - RESET: Resets the KZTSA SCSI bus, useful for clearing a hung bus.
Appendices:
- Hardware Specifications: Details functional (e.g., Intel 80960CA and NCR 53C720 processors, 20 MB/s synchronous transfer rate) and environmental limitations.
- Firmware Update Utility: Provides procedures for updating the adapter's Flash ROM firmware.
- Device Parameter Disable Utility: Explains how to use a console utility (devparams) to enable or disable specific SCSI activities (like synchronous/wide data transfer negotiation, device disconnect privilege, and tag command queuing) for individual devices or the entire bus.
- Troubleshooting: Offers solutions for common problems encountered during power-up and boot sequences, such as no response, display issues, self-test halts, and unrecognized SCSI devices, often recommending checking connections, SCSI IDs, or using INIT or RESET commands.

In essence, the document provides a comprehensive guide for the installation, configuration, testing, and maintenance of the KZTSA SCSI Storage Adapter, emphasizing proper SCSI bus management and utility usage for troubleshooting.