SCSI Tips

• You may connect up to six individual SCSI devices on a single SCSI card cabled together forming one continuous SCSI chain.
  
  
• The combined SCSI chain length (the total of all cables in the SCSI chain) should not exceed six meters (19.6 feet).
  
  
• The fastest device (comparing data transfer rates) should be the last or farthest from the computer to prevent problems with termination.
  
  
• Each device on the SCSI chain must have a unique SCSI ID or address. SCSI ID #7 is reserved for the SCSI host adapter or SCSI card, and cannot be used by any devices.
  
  

How to check the SCSI ID and termination on the Zip® SCSI drive

SCSI termination must be installed (switched ON (I) or AUTO (A)) for the first and last devices in the SCSI chain and removed, or switched OFF, on all others. Signal reflections may otherwise interfere with data transfers or cause erratic operation.

Instruction for the external Zip SCSI drive

1. To set the ID number on your external Zip drive, power off the drive and computer.
   
   
2. Move the slide switch located on the back of the Zip drive to either 5 or 6. The ID for the Zip drive must be unique to the SCSI chain. The default setting is ID 5.
   
   
3. Located next to the ID slider, is the TERM slider. Move the TERM slider to either the ON (I) or OFF (O) position. If it is in the ON position, then the Zip drive must be the last device on the SCSI chain. The Zip drive is terminated by default.
   
   

Instructions for the internal Zip SCSI drive

1. Power off your computer.
   
   
2. Remove the jumper located on the top back of the drive that is labeled ID. This will set the ID number to 6. If the jumper is covering the pins, the ID is set to 5. The ID for the Zip drive must be unique to the SCSI chain. The default setting is ID 5.
   
   
3. Located next to the ID jumper is the TERM jumper. If the TERM jumper is covering the pins then the Zip drive is terminated, which means that it must be the last device on the SCSI chain. If the TERM jumper is removed, the termination for the Zip drive is off and the Zip drive cannot be the last device in the SCSI chain. The Zip drive is terminated by default.
   
   
4. After you have correctly set the Zip drive's ID and termination, power on your computer.
   
   

Refer to the documentation that came with your Zip Drive for additional information. There are diagrams and procedures that will guide you through changing SCSI ID and termination.

		If you did not find your answer...
		Click here for additional troubleshooting and support options