B Sun SCSI Device Identification Procedures

B.1 Introduction

The information contained in this Appendix will illustrate the correct procedure for setting the SCSI Target ID and installing the device Target ID jumpers on Sun supported SCSI devices.

Use the information in this Appendix to perform tasks required to configure these devices:

• SunCD

• 2.3GB 8mm Tape Drive

• 1.3GB Disk Drive

B.2 The Sun SCSI Device Protocol

The Sun SCSI Protocol demands the following parameters:

• SCSI devices are connected to each other serially.

• There will be no more than seven SCSI devices in any single configuration connected to the SCSI host adapter.

• Each SCSI device on a SCSI host adapter must have a unique SCSI Target ID.

• SCSI devices may be physically connected in any sequence regardless of their Target ID.

• The SCSI daisy chain must be terminated at both ends. The SCSI host adapter automatically terminates one end, and the last SCSI device physically located at the end of the daisy chain, must be terminated.

B.3 The Sun SCSI Target ID Logic

Table B-1 The Sun default Target ID settings (as provided by the system software).

Note - Table B-1 shows the Sun default Target ID as supplied by the system software for the first SCSI host adapter in a system. SCSI Target ID for each particular type of device may be custom modified, by a qualified operator, by reconfiguring the appropriate system file. See System and Network Administration for the Sun Workstation manual, P/N 800-1323.

B.4 Preparing to Configure a SCSI Device for Installation

Note - Configure the SCSI Target ID on a device before installing it in the Sun system. The involved connector or switch may not be accessible after installation is complete.

Configure the SCSI Target ID for the device according to its position in the particular Sun system. The method of configuring the device will differ with the device type. The installer configures the device by performing the following operations

• installing jumpers on a provided connector (SCSI 5.25" devices)

Inspection and Handling Precautions

After unpacking the device, inspect it for evidence of damage. If damaged, keep all contents and packing materials for the carrier's agent to inspect. Save packing materials for future use.

Caution -

Figure B-1 Applying the Anti-Static Wrist Strap

Caution -

B.5 SCSI Device Descriptions and Configurations

Configuring the SunCD

Connector Locations

The SCSI Target ID, SCSI interface, and power connectors are located on the rear panel of the SunCD. Refer to Figure B-2 for the connector locations.

Figure B-2 Connector Locations for the SunCD

1. Remove the jumpers from the SCSI Target ID receptacle on the drive using needle-nose pliers.

Note - A jumper is a small metal sleeve that slides over two neighboring pins in the SCSI Target ID receptacle to provide an electrical connection.

2. Refer to Table B-2 and arrange the jumpers on the receptacle to assign the SCSI Target ID.

Table B-2 SCSI Target ID Settings for the SunCD

Note - The Sun SCSI Protocol only supports one SunCD on any host adapter or controller at SCSI Target ID 6. To install more than one SunCD in any Sun system will require a different host adapter for each device, with the SCSI Target ID set to 6.

Configuring the 2.3 GB 8mm Tape Drive

Connector Locations

The SCSI Target ID, SCSI interface, and power connectors are located on the rear panel of the 2.3 GB tape drive. Refer to Figure B-3 for the connector locations.

Figure B-3 Connector Locations for the 2.3 GB Tape Drive

1. Remove the jumpers from the SCSI Target ID receptacle on the drive using the needle-nose pliers. Refer to Figure B-3 for the location of the SCSI Target ID receptacle.

Note - A jumper is a small metal sleeve that slides over two neighboring pins in the SCSI Target ID receptacle to provide an electrical connection.

2. Refer to Table B-3 and arrange the jumpers on the Target ID receptacle to assign the desired SCSI Target ID.

Table B-3 SCSI Target ID Settings for the 2.3 GB Tape Drive

Configuring the 1.3GB Disk Drive

Connector Locations

The SCSI Target ID, SCSI interface, and power connectors are located on the rear panel of the 1.3GB disk drive. Refer to Figure B-4 for the connector locations.

Figure B-4 Connector Locations for the 1.3GB Disk Drive

1. Remove the jumpers from the SCSI Target ID receptacle on the drive using the needle-nose pliers. Refer to Figure B-4 for the location of the SCSI Target ID receptacle.

On the drive there are two SCSI Target ID receptacle groups mounted in the same housing. Both receptacles groups provide the same function, but they are of different pin and pattern sizes. For use in this pedestal, use the smaller pattern receptacle group to the left in the connector body. Do not use both receptacles groups to set the SCSI Target ID.

Note - A jumper is a small metal sleeve that slides over two neighboring pins in the SCSI Target ID receptacle to provide an electrical connection.

2. Refer to Table B-4 and arrange the jumpers on the Target ID receptacle to assign the desired SCSI Target ID.

Table B-4 SCSI Target ID Settings for the 1.3B Disk Drive