Currently Being ModeratedAug 5, 2013 8:15 PM (in response to gary.h.1507)
You can only repair a disk by booting from another one. Use your original grey PowerBook G4 Software Install and Restore DVD or a retail black Tiger Install DVD. Insert that disc and start your PB while holding the c key to boot from the optical drive. Choose Disk Utility from the Utilities menu.MacBooks iMacs iPads AirPorts, OS X Mountain Lion, 28 years Apple!
Currently Being ModeratedAug 7, 2013 7:26 AM (in response to John Galt)
John, I hope you or someone can help because I took one step forward and a bunch back.
Your advice solved the problem, almost - I still can't fix the disk (but permissions worked) - it's giving a "invalid sibling link" message which appears to be impossible to get rid of and prevents the repair disk from working, but the Powerbook was working great except - I have a USB keyboard and it wouldn't work with the hard drive. It worked when booted from the DVD. I searched and found some things to try but the latest made it worse. Now it won't boot from the hard disk - the progress wheel just keeps turning. It will boot from the start up disk.
The "fix" I found was supposed to be something that would work between boots. This is from the message I found which is in an archived discussion:
I have come across the same problem. I found a temporary solution, but am still looking for a permanent fix.
in Terminal type:
sudo kextload /System/Library/Extensions/IOUSBMassStorageClass.kext
this should work until reboot or so.
Like I said, now when I try and boot from the hard disk, all I get is the progress wheel.
How can I reverse the entry? Any suggestions?
Currently Being ModeratedAug 7, 2013 7:33 AM (in response to gary.h.1507)
I know of only two ways to fix the "invalid sibling link" error, either refornat the disk or use DiskWarrior
Either way you need to have a good backup prior to do either of those steps
That error indicates that there are serious problems with the directory the operating system uses to keep track of files. If the corruption causing these problems is not corrected evenually the disk will become unusable.
Currently Being ModeratedAug 7, 2013 7:49 AM (in response to gary.h.1507)
Here's an interesting update - I booted from a backup drive (fire wire). (I hadn't backed up for quite a while and the back up program won't work [SuperDuper], but while the hard drive was working yesterday I copied all my document files over to the backup drive so at least the documents are current). Anyway, I'm able to access and work on the hard drive through Finder. The keyboard works too.
Give you any more ideas?
Currently Being ModeratedAug 7, 2013 9:00 AM (in response to gary.h.1507)
I originally replied with essentially what Allan Eckert wrote above until I realized you may have attempted to use Disk Utility to repair the disk on which it's running.
Whatever fault that caused this to occur most likely erased or corrupted the kernel extension required for your USB keyboard to work. It is very likely that other files are also corrupted. Therefore the very first thing you must do is to retrieve and safely archive every file on your PowerBook that you consider essential.
Only after that, you may elect to use Disk Warrior or similar utility to repair the disk, but bear in mind the word "repair" does not imply it is permanently fixed even if it reports success.
Whatever anomaly caused the corruption to begin with is likely to recur though, so if you want to keep your PowerBook in service its disk must be replaced.
Reinstalling OS X from your original grey System disk will probably restore your USB keyboard to operation.MacBooks iMacs iPads AirPorts, OS X Mountain Lion, 28 years Apple!
Currently Being ModeratedAug 7, 2013 11:30 AM (in response to gary.h.1507)
Since the external firewire drive seems to work properly and you have copied essential data and software to it, then consider cloning it to your internal drive. I have had a few problems with Super Duper on one machine so have been using CCC for cloning. You can try it before purchase. If there are bad parts on the internal disk the clone software may reject the attempt. If that happens you need a new drive.
We offer a fully functional trial version of Carbon Copy Cloner which you may use to evaluate its suitability for your needs before purchase.
Currently Being ModeratedAug 9, 2013 8:18 AM (in response to dalstott)
Thanks for your help. I erased the hard drive and restored from Super Duper. All is well - running great for an old machine, just had to reenter some minor rules and signatures.
Now I wish I the power PC was still supported by Adobe, Firefox and others so I don't have to buy a new powerbook. Far as I can tell, I can't do anything to upgrade the one I have....unless someone knows a way to do it.