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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Desktops > Hard drive jumper settings on a G4 System

Hard drive jumper settings on a G4 System
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Thomas_MacFreak
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Join Date: Aug 2003
Location: Oslo, Norway
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Oct 28, 2003, 11:44 AM
 
Hi!

I have a Power Mac G4 733MHz, with two hard drives. One 120GB (Western Digital), and one 40GB (IBM). I'm want to make sure I have set the jumper settings right.

On the IBM (HITACHI) website, they say something about 15 and 16 Logical Head. What is that? What should I choose?

I found this about Logical Heads:

"Note: Some systems may require you to use the 15 head logical architecture. This is because they translate a drive greater than 4 GB by multiplying the head count by 16. The result (16 x 16 = 256) is interpreted as 0 heads with a 0 capacity and is an illegal head count. Selecting the 15 head logical jumpers produces a legal translation (16 x 15 = 240). The translated cylinder count varies to achieve the drive's full capacity."

Please, I really need help. Fast...
Power Mac G5 Dual 2.5GHz (June 2004), 2GB ram, 570GB HD, Radeon 9600XT 128MB, OS X 10.4.5
Aluminium 20-inch Cinema Display
     
   
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