Chances are very good that ram would cause an issue in OS X. It has  
some pretty strict specs for RAM, in regards to error corrections and  
timing.


On Dec 5, 2008, at 8:21 AM, Brian Durant wrote:

> Thanks for your reply, Kris.
>
> On Fri, Dec 5, 2008 at 12:42 PM, Kris Tilford <[EMAIL PROTECTED]>  
> wrote:
>
> On Dec 5, 2008, at 2:31 AM, Brian Durant wrote:
>
> > I have had a  problem similar to other postings on this list with my
> > G5 single and 10.5.5. I don't think there was a kernel crash, I
> > couldn't find it in the logs at any rate, but I have been
> > experiencing problems with the system becoming very slow. I ran Disk
> > Utility from my system with no errors. Big hit on performance
> > continued. Checked the activity monitor, but I couldn't find
> > anything out of the ordinary. I booted from the 10.5 DVD and ran
> > Disk Utility again, still no disk errors. Ran fix permissions.
> > Permissions froze.
>
> Permissions froze? The System that froze was the  DVD booted System. I
> don't see how the HD permissions repair could "freeze" the DVD System
> unless the HD itself or the motherboard that controls it was having
> "issues".
>
> Yes, the system that froze was the DVD booted system. The system DVD  
> is 10.5.5 and it was very unstable when I tried to upgrade from  
> Tiger on my G5.
>
> > Rebooted. Yaboot gone
>
> Yaboot? You're running a dual boot OS X & Linux G5?
>
> Yes, Ubuntu 8.04.
>
> > and my aluminum Apple keyboard refused to open DVD. Hooked up an old
> > white Apple keyboard. Ran DiskWarrior. Accepted the changes, which
> > were minor - a couple of folder icon changes and something with the
> > library. Rebooted. Apple appeared with white background, some of the
> > drivers loaded and then just got a spinning wheel. Never completed
> > booting. Hard shutdown, tried again, same problem. Rebooted from
> > 10.5 DVD. Started restore from backup. 39.2% completed and the
> > restore crashed.
>
> I think you jumped the gun with the restore. I would have reinstalled
> the 10.5.5 Combo Update first. The spinning wheel that late in the
> boot was probably the login window problem, which is pretty minor, and
> can sometimes be fixed by trashing preferences, although reinstalling
> the Combo Update would likely also fix it, and sometimes you can
> simply startup in Safe Mode and then restart and it's fine.
>
> I may have jumped the gun, I don't know. The system was set up to  
> boot without a login window.
>
> > Now I am sitting here and wondering how and why the damn situation
> > disintegrated to the point where I am at now!!
> > Any ideas how to get out of this situation would be appreciated with
> > my info intact.
>
> I never "restore" from backup, so I don't know what that entails. I
> think you're saying you're cloning a backup HD onto the boot HD using
> Disk Utilities "Restore" function, and it failed, meaning your HD is
> likely not bootable at all, and all the original data is gone? If
> that's the case, wow, you did degenerate too fast.
>
> I used Time Machine or Capsule or whatever it is called in Leopard.  
> Again, the system DVD is extremely unstable. The latest news is that  
> I managed to restore after having unplugged everything from my  
> computer except for a keyboard and a mouse. The restored system  
> refused to boot, so in Yaboot I get a blinking OS 9 style system  
> folder icon. Next, I tried a reinstall of system 10.5.5 using  
> "archive and install". Unfortunately, The installer stopped, with  
> the message that it could not prepare the disk.
>
> I like to clone using Carbon Copy Cloner, although the newest version
> has had some issues. When I cloned a very large bootable HD I got a
> bad clone that wouldn't boot, and it took forever to clone. I tried
> SuperDuper and it was nearly twice as fast to clone the same HD and
> booted first time. Someone mentioned that the new CCC has a preference
> to ignore permissions when cloning that will make the clone
> unbootable, so I may have missed this preference setting and that was
> my own fault?
>
> Your symptoms sound ominous, like a hardware issue to me. You've had
> problems booted from the HD. You've had problems booted from the DVD.
> This isn't good. Those are two separate Systems completely, and both
> shouldn't have problems together unless something bigger is the
> problem, and that's RAM, motherboard, or CPU. I'd think about RAM
> testing first. These G5's have dual channel RAM in matched pairs, and
> one bad module can really mess things up, and a mismatched pair is
> also bad.
>
> I don't know how to test if the RAM is bad. At this point in time, I  
> can only boot from the Leopard 10.5.5 system DVD or from Ubuntu  
> 8.04, now that I have Yaboot back. However, I have to say that  
> Ubuntu performs flawlessly, so what are the chances of the RAM only  
> acting up under OS X?
>
> Cheers,
>
> Brian
>
>
> >


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