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You are here: MacNN Forums > Enthusiast Zone > Classic Macs and Mac OS > Can you tell me how to terminate a SCSI disk correctly...?

Can you tell me how to terminate a SCSI disk correctly...?
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BTP
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Join Date: Feb 2001
Location: 34.06 N 118.47 W
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Aug 13, 2001, 07:29 PM
 
I have two HD's in my clone, one is an old 9.1G Micropolis that has a termination problem, or so I suspect.

The diagram in the above link led me to think that I should set jumpers at W1 and W4. I still seem to have a termination problem, as OS X verbose boot mode gives me the error.

Can some of you better informed folk ou there lend a hand? If I get this fixed, I'll have OS X on a upgraded Power Tower Pro....
A lie can go halfway around the world before the truth even gets its boots on. - Mark Twain
     
<rfitz>
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Aug 13, 2001, 08:10 PM
 
Are they terminated?
     
BTP  (op)
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Join Date: Feb 2001
Location: 34.06 N 118.47 W
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Aug 13, 2001, 10:46 PM
 
The cable is terminated, the drives are terminated by the jumpers.

Or at least that is what I think.
A lie can go halfway around the world before the truth even gets its boots on. - Mark Twain
     
Mac Elite
Join Date: Oct 1999
Location: near Boulder, Colorado
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Aug 15, 2001, 08:35 PM
 
The way I read your link, you want W2 and maybe W4.
The MoBo provides "term power", hence W2.
If the Micropolis is the first drive on the internal ribbon, W4 is unnecessary, MoBo takes care of the first device. Use W4 for the last drive on the internal ribbon.

General rule for SCSI I've used for years is first and last on a chain. That's Physical location on the cable/chain, not address.
     
Fresh-Faced Recruit
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Aug 16, 2001, 10:21 PM
 
Do you have a G3 card installed and Sonnet's OS X update? If not, that could cause boot issues.
     
   
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