jumpers again

2009-03-17 Thread Lawrence David Eden

I want to thank all of you that offered your advice and wisdom 
regarding the jumper settings on my hard drives.  I love this List!

For the edification of others, here is what worked for me:

I have 2 hard drives:  Quantum Fireball (20 GB) and Seagate Barricuda (80 GB).

I have the Quantum set to MASTER.
I removed the jumpers on the Seagate as per OWC tech support.  This 
sets the Seagate to Slave.

The tech guy told me that after I have successfully booted the 
computer (BW upgraded to G4), I should forget about the jumpers and 
just use SystemPreferences/Startup Disk to tell the Mac what drive to 
boot from.  Happily, I am up and running.

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Re: jumpers again

2009-03-17 Thread PeterH


On Mar 17, 2009, at 8:59 AM, Lawrence David Eden wrote:

 The tech guy told me that after I have successfully booted the
 computer (BW upgraded to G4), I should forget about the jumpers and
 just use SystemPreferences/Startup Disk to tell the Mac what drive to
 boot from.

Master and slave are really not master per se nor slave per se. Both  
are peers (have the same priority) but have different identities  
(logical unit 0 and logical unit 1, for example).

In the PCI card implementation of ATA, the two cables are divided up  
so that the drives appear as SCSI bus x, logical units 0 and 1, and  
logical units 2 and 3.

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