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Repairing OS X disks in a GUI System
If you have filesystem errors, Mac OS X doesn't allow you to repair the startup disk, so you need to boot from a CD to run a repair utility. Of course if you formatted your drive in UFS, tools like Disk First Aid and Norton Utilities won't be able to do anything for you. However, Apple has provided a solution.

If you boot from the OS X install CD, you can go to the Installer menu, and choose "Open Disk Utility...". This will allow you to test and repair both UFS and HFS+ disks, without having to venture into the scary land of terminals and Single User Mode.
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Disk Errors in OS X
Authored by: jonahlee on May 17, '01 12:44:36PM

Starting off the OS X disc only seems to fix part of the errors, and the latest version of Norton constantly sees new dirctory errors. If I fix it using Norton it kills the OS X disc, making me reinstall. And the errors keep popping up? Is there any other way to fix my Hard Disc from within OS X?



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Disk Utility not repairing all "errors"
Authored by: Bart VdBroeck on May 17, '01 01:28:29PM

This is a known but minor issue. The "errors" are caused because the disk is in use. There's an Apple TIL about this, but I don't have it handy. So don't worry about those errors that remain, they aren't actual errors. Norton doesn't know that and therefor kills your OS disk.

If you really want to be sure, check the disk with fsck in single user mode (Start up with Apple-s pressed and then just read the line right above the one where you enter your commands. It informs you that the command "fsck -y" will check your disk. If it finds and repairs errors, enter it again until it doesn't anymore. Then enter the command "reboot" and let your computer start up the regular way.)

Another possibility is to check your disk while booted from another disk, e.g. the install cd.



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The TILs
Authored by: Bart VdBroeck on May 17, '01 01:34:42PM

Okay, found the TIL. It's number is 106270 and its URL is <http://til.info.apple.com/techinfo.nsf/artnum/n106270>.

Another one you might find interesting is number 106214 at <http://til.info.apple.com/techinfo.nsf/artnum/n106214>.

The TILs are generally a good place to look for help if you experience unusual behavior. With your computer of course. Another site to check out is MacFixit at <http://www.macfixit.com>.



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