Connecting SCSI Devices: Adaptec SCSI Card 39160 User's Guide

Connecting SCSI Devices

Connecting SCSI Devices

Introduction • Installing the Adaptec SCSI Card 39160 • Setting Up SCSI Devices • Configuring using SCSISelect • Adaptec SCSI Card Driver Software • Troubleshooting

You can connect a total of 30 SCSI devices to the Adaptec SCSI Card 39160, with up to 15 devices on each SCSI channel. Before connecting devices, be sure to review Setting Up SCSI Devices.

Caution: Do not connect SCSI devices to more than two of the three SCSI Channel A connectors at the same time.

Caution: Do not connect SCSI devices to more than two of the three SCSI Channel A connectors at the same time.

Connecting Internal LVD SCSI Devices

A special 68-pin internal LVD cable is required to connect internal LVD SCSI devices. If your cables are not marked, you can identify most LVD cables as having twisted pairs of the flat ribbon cable between the device connectors. Some cables are laminated so that they lay flat. Internal LVD cables usually have a terminator built into the end of the cable.

Follow these steps to connect your internal Ultra160 and Ultra2 devices:

Note: We recommend that you keep your LVD SCSI devices on a separate SCSI channel from your SE (Ultra SCSI) devices. This allows LVD SCSI devices to transfer data at their maximum speed.

Note: We recommend that you keep your LVD SCSI devices on a separate SCSI channel from your SE (Ultra SCSI) devices. This allows LVD SCSI devices to transfer data at their maximum speed.

Locate the 68-pin internal LVD SCSI cable.

Plug the non-terminated end of the cable(s) to the internal LVD/SE connector(s).

Plug the internal LVD SCSI devices to the other cable connectors, starting with the connector at the terminated end of the cable.

Note: Internal LVD SCSI devices come from the factory with termination disabled and cannot be changed. Proper termination is provided by the terminator at the end of the LVD SCSI cable. See Terminate the Ends for more information.

Note: Internal LVD SCSI devices come from the factory with termination disabled and cannot be changed. Proper termination is provided by the terminator at the end of the LVD SCSI cable. See Terminate the Ends for more information.

Connect a power cable from your computer's internal power supply to each internal SCSI device.

Connecting Internal Ultra/Wide SCSI Devices

You can connect Internal Ultra/Wide SCSI devices to the internal LVD/SE connectors. If you do this, we recommend that you connect them to the SCSI Channel A LVD/SE connector and that you connect all LVD SCSI devices to the SCSI Channel B connector.

Follow these steps to connect internal Ultra/Wide SCSI devices:

Locate the 68-pin internal Wide SCSI cable.

Plug one end of the cable to the Channel A internal 68-pin connector on the Adaptec SCSI Card 39160.

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Plug the other end of the cable to a terminated Ultra/Fast Wide SCSI device.

If you have other Ultra/Fast Wide SCSI devices, attach them to the connectors between the two ends of the cable. Be sure these other devices are un-terminated.

Connect a power cable from your computer's internal power supply to each internal device.

Connecting Internal Ultra/Fast Narrow SCSI Devices

Caution: Do not connect SCSI devices to more than two of the three SCSI Channel A connectors at the same time.

Caution: Do not connect SCSI devices to more than two of the three SCSI Channel A connectors at the same time.

If you have internal Ultra/Fast Narrow SCSI devices with standard 50-pin connectors, you can connect them to the 50-pin internal SE Narrow SCSI connector. Follow these steps to connect the devices:

Locate the 50-pin internal Ultra Narrow SCSI cable.

Plug one end of the cable to the 50-pin internal SE Narrow SCSI connector on the Adaptec SCSI Card 39160.

Plug the other end of the cable to a terminated Ultra/Fast Narrow SCSI device.

If you have other Ultra/Fast Narrow SCSI devices, attach them to the connectors between the two ends of the cable. Be sure these other devices are un-terminated.

Connect a power cable from your computer's internal power supply to each internal device.

Connecting External SCSI Devices

You can connect external LVD SCSI devices to the 68-pin external LVD/SE SCSI connectors. For each external device, you will need to obtain a 68-pin external VHDCI LVD SCSI cable.

Note: We recommend that you connect only LVD SCSI devices to the external SCSI connectors in order to achieve the maximum data transfer rate. We also recommend that you not combine older SCSI devices with the newer LVD SCSI devices on the same SCSI channel of the Adaptec SCSI Card 39160. Do not connect SCSI devices to more than two of the three SCSI Channel A connectors at the same time. If you connect devices to all three of the SCSI connectors, you may experience termination problems or time out failures, or the host adapter may not see all the devices.
We recommend that you do not connect SCSI devices to both the internal and external connectors of the same channel. However, if you need to use the internal and the external connectors, verify that each SCSI device connected to the channel has a unique SCSI ID.

Note: We recommend that you connect only LVD SCSI devices to the external SCSI connectors in order to achieve the maximum data transfer rate. We also recommend that you not combine older SCSI devices with the newer LVD SCSI devices on the same SCSI channel of the Adaptec SCSI Card 39160. Do not connect SCSI devices to more than two of the three SCSI Channel A connectors at the same time. If you connect devices to all three of the SCSI connectors, you may experience termination problems or time out failures, or the host adapter may not see all the devices. We recommend that you do not connect SCSI devices to both the internal and external connectors of the same channel. However, if you need to use the internal and the external connectors, verify that each SCSI device connected to the channel has a unique SCSI ID.

Follow these steps to connect your external SCSI devices:

Connect one end of an external SCSI cable to one of the external Ultra160 connectors on the Adaptec SCSI Card 39160.

Connect the other end of the cable to a SCSI connector on the back of an external device. If you are installing only one external device, terminate the device and skip to Step 4. Refer to Terminate the Ends.

Connect the other external SCSI devices by linking each device to the previous one, as shown below. Terminate only the device at the end of the chain.

Connect power cables to all external device(s) and to the computer.

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