B SCSI Device Identification Procedures

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

2.3 Gbyte 8mm tape drive

5.0 Gbyte 8mm tape drive

1.3 Gbyte SCSI disk drive

2.1 Gbyte differential SCSI disk drive

B.1 The Sun SCSI Device Protocol

The Sun SCSI protocol demands the following parameters:

SCSI devices are connected to each other in parallel.

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.2 The Sun SCSI Target ID Logic

Table B-1 The Sun Default Target ID Settings

------------------------------------------------------------------------

                                                                          
SCSI Logical Device           SD0  SD1    SD2   SD3/ST2  ST0   ST1   CD   H/A
------------------------------------------------------------------------

                                                                          
SCSI Target ID                3    1      2     0        4     5      6   7
                                                                          
Jumper Positions (binary)     011    001   010   000      100   101  110   111

------------------------------------------------------------------------

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 the System and Network Administration for the Sun Workstation manual.

B.3 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 installing jumpers on a provided connector.

B.3.1 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 -

Circuit board components are vulnerable to damage by electrostatic discharge (ESD). An electrostatic charge can build up on the human body and then discharge when you touch a board or a magnetic storage device (disk drive, etc.). Such discharge can be produced by walking across a carpet and touching a board, or by any other similar action. Before handling any board or magnetic storage device, make sure you dissipate your body's charge. Touch a conductive surface that is connected to common earth ground to discharge the static electricity present in your body.

To minimize risk of ESD damage
o Handle board by edges only
o Store board or storage device in anti-static bag provided
o Use a grounding strap and Sun ESD mat, PN 250-1088-xx, whenever you work on a board or storage device (instructions are printed on the mat).

Figure B-1 Applying the Anti-Static Wrist Strap

Caution -

A SCSI device is an electromechanical device that may be damaged by excessive physical shock. Do not jar this device or drop it. A SCSI device should be handled only by service personnel who are familiar with the correct methods of working with SCSI devices.

B.4 SCSI Device Descriptions and Configurations

B.4.1 Configuring the SunCD

B.4.1.1 Connector Locations

The SCSI 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 ID connector on the drive using needle-nose pliers.

Note - A jumper is a small metal sleeve that slides over two neighboring pins in the SCSI ID connector 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

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SCSI Device      SCSI Target ID Setting  Jumper Position
-----------------------------------------------------------

SunCD 6

Pin designation P 0 1 2 -----------------------------------------------------------

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.

B.4.2 Configuring the 2.3 Gbyte 8mm Tape Drive

B.4.2.1 Connector Locations

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

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

1. Remove the jumpers from the SCSI ID connector on the drive using the needle-nose pliers (see Figure B-3).

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-5 and arrange the jumpers on the SCSI ID connector to assign the desired SCSI target ID.

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

-------------------------------------------------

                                  
SCSI Device      SCSI Target ID   Jumper Position
                 Setting                           
-------------------------------------------------

2.3 Gbyte Tape 5 Drive

2.3 Gbyte Tape 4

Drive -------------------------------------------------

B.4.3 Configuring the 5.0 Gbyte 8mm Tape Drive

B.4.3.1 Connector Locations

The SCSI ID, SCSI interface, and power connectors are located on the rear panel of the 5.0 Gbyte tape drive. The SCSI ID dip switch is also located on the rear panel of the tape drive. Refer to Figure B-4 for the connector and switch locations.

Figure B-4 Connector Locations for the 5.0 Gbyte Tape Drive

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

Refer to Figure B-4 for the location of the SCSI ID connector.

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

2. Change the setting on the SCSI ID dip switch to set the correct SCSI address for the tape drive (see Figure B-4 for the location of the SCSI ID dip switch).

Refer to Table B-4 and change the setting on the SCSI ID dip switch to assign the desired SCSI address.

Table B-4 SCSI ID Setting for the 5.0 Gbyte Tape Drive

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SCSI ID Setting  Dip Switch Position
-------------------------------------

-------------------------------------

B.4.4 Configuring the 1.3 Gbyte SCSI Disk Drive

B.4.4.1 Connector Locations

The SCSI ID, SCSI interface, and power connectors are located on the rear panel of the 1.3 Gbyte disk drive. Refer to Figure B-5 for the connector locations.

Figure B-5 Connector Locations for the 1.3 Gbyte Disk Drive

1. Remove the jumpers from the SCSI ID receptacle on the drive using the needle-nose pliers. Refer to Figure B-5 for the location of the SCSI ID receptacle.

On the drive there are two SCSI 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 ID receptacle to provide an electrical connection.

2. Determine where you will install the disk drive in the SCSI drive tray.

There are four available locations for the disk drive in the tray, and the location of the disk drive will determine which SCSI address it will have (see Figure B-6).

Figure B-6 Four Disk Drives in a SCSI Drive Tray

3. Refer to Table B-5 and arrange the jumpers on the SCSI ID receptacle to assign the desired SCSI target ID.

Table B-5 SCSI Target ID Settings for the 1.3 Gbyte Disk Drive

-----------------------------------------------

                                
SCSI Device      SCSI Address   Jumper Position
                 Setting                         
-----------------------------------------------

1.3 Gbyte Disk 3 Drive

1.3 Gbyte Disk 1

Drive 1.3 Gbyte Disk 2

Drive 1.3 Gbyte Disk 0

Drive -----------------------------------------------

B.4.5 Configuring the 2.1 Gbyte Differential SCSI Disk Drive

B.4.5.1 Connector Locations

The SCSI ID, SCSI interface, and power connectors are located on the rear panel of the 2.1 Gbyte differential SCSI disk drive. Refer to Figure B-7 for the connector locations.

Figure B-7 Connector Locations for the 2.1 Gbyte Differential SCSI Disk Drive

1. Verify that the jumpers have been removed from the SCSI ID connector at the rear of the 2.1 Gbyte disk drive (see Figure B-7).

A jumper is a small sleeve that slides over two adjacent pins in the SCSI ID connector to provide an electrical connection. If the jumpers have not been removed, use the needle-nose pliers to remove them from the SCSI ID connector at the rear of the disk drive.

2. Verify that the jumpers are installed on the Wait Spin Enabled and Sweep Cycle Enabled connectors on the 2.1 Gbyte disk drive (see Figure B-7).

The jumpers should be installed on the connectors so that the jumper set looks like those shown in Figure B-8.

Figure B-8 Connector Locations on the Drive

3. Verify that there is no jumper installed on the SCSI Bus Parity connector (see Figure B-8).

4. Determine where you will install the disk drive in the SCSI drive tray.

There are four available locations for the disk drive in the tray, and the location of the disk drive will determine which SCSI address it will have (see Figure B-9).

Figure B-9 Four Disk Drives in a SCSI Drive Tray

5. Install the jumpers in the appropriate positions on the SCSI ID connector to set the SCSI address for the disk drive (see Table B-10).

Table B-10 SCSI ID Setting for the 2.1 Gbyte Disk Drive

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SCSI ID Setting  Jumper Position
---------------------------------

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