>> Nancy Haitz wrote:
>> I have a small question about using the Internal/External SCSI Bus.
>> snip...

> Jeff Walther wrote:
> You should be able to use both connectors.
> really big snip...

Thanks Jeff,

Would you mind answering another SCSI question or two?

As briefly as possible...
The 9600 (purchased used) came with a 4GB SCSI drive and a SCSI CDROM.  
That 4 GB drive was connected to the last connector on the internal SCSI 
cable.  Based on what you told me, and what I found on Apple's web site, 
the motherboard terminates the SCSI chain at the beginning, and that 
hard drive should have terminated the chain at the end.  However, there 
were/are no jumpers on the original 4 GB drive. "Ignorance is bliss" 
must have come with the machine ;-)

About two years ago, I replaced the original 4GB SCSI drive with an 18 
GB SCSI drive.  Since the 4 did not have any jumpers on it, I did not 
put any on the 18.  The drive and everything in the computer worked fine 
like that for a good two years.

The 4GB drive was installed in the c600, on the combo  internal/external 
SCSI chain.  Also without jumpers.

I recently swapped the 18 GB drive into the c600 and the 4 GB back into 
the 9600, when I added the IDE PCI card and IDE  drive to the 9600.  
Both of these SCSI drives are still without any jumpers.

The original 4GB drive is the one that passed away recently.  I just got 
a replacement for it.  Before installing it I need some clarification.  
Please tell me if I am correct on the following:

1.  The SCSI hard drive in the 9600 "should" have termination enabled, 
and should be connected to the last cable connector on the internal SCSI 
chain.

2.  The SCSI hard drive in the c600 "should not" have termination 
enabled and can be connected to any convenient cable connector on the 
SCSI chain.

On the c600, if the motherboard terminates the beginning of the chain, 
does it "sense" an absence of external devices, if there are none 
connected to the external port, and automatically terminate the combo 
internal/external SCSI chain?  If not, who is doing the terminating, if 
there are no external devices with a terminator on the last device?

Nancy



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