Apple Hard Drives: Termination Requirements

Hard drives or DAT drives may need to have the termination resistors removed or made inoperative on certain configurations of multiple drive systems or WorkGroup Servers. Below is a brief description of termination requirements for the different systems or WorkGroup Servers.

Computer Model                   Termination Requirement
--------------                   -----------------------
Quadra/Centris 660 AV            Hard Drive needs termination
Quadra/Centris 610
Power Macintosh 6100/60
Workgroup Server 60
Workgroup Server 6150

Macintosh IIvx, IIvi             Hard Drive needs termination
Quadra/Centris 650
Power Macintosh 7100/66

Quadra 800/840 AV                Last drive in line needs termination.
                                Remove termination from all other drives
                                installed, including DAT.

Power Macintosh 8100/80          Has two internal cables:
Workgroup Server  8150           1) Internal/external cable requires that    
                                   all drives have no termination.  Remove
                                   termination from all internal drives
                                   (termination is on cable)
                                2) The internal channel cable (max 1 drive
                                   only) requires termination.

Quadra 900                       Remove termination from all internal
Quadra 950                       drives (termination is on cable).
Workgroup Server 95                            
Workgroup Server 9150
Published Date: Feb 19, 2012