Installation

2.Termination - Both Internal and External Devices

Check that the drive channel is properly terminated according to the drawing below.

If the controller is in the middle of the SCSI bus, it automatically disables on-board termination. If some SCSI devices on the channel are connected to the internal connector, and some are connected to the external connector, on the same channel, the two ends of the SCSI bus farthest from the controller must each be terminated.

See Figure 2-11for an example of a combined internal and external drive configuration. Notice that they are on the same channel.

☛Note

It is better to terminate the ends of the SCSI bus itself than it is to terminate the end devices on the bus. This allows hot swap devices to be added or removed from the SCSI bus without affecting termination.

☛Note

The only devices controlled by the RAID configuration are the ones physically connected to the AcceleRAID 170 controller.

Figure 2-11. Termination with Internal and External Drive Configuration

3.Remove or set disk drive termination jumpers to the disabled position (if needed). Refer to the documentation furnished with your disk drives to determine if your termination jumpers need to be adjusted.

Manual No. 775064

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