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A possible fix for invalid sibling links on a hard drive
Authored by: bgbevan on Jan 27, '08 06:27:54AM

BEWARE of using this method on an external drive. While it worked GREAT on recovering my internal ATA drive when nothing else would, use caution when dealing with an external drive.

Although my external firewire drive was working just fine, I ran Disk Utility and got the following message:

Verifying volume "PSP_7000"
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
hash table full (32 entries)
Error: The underlying task reported failure on exit

1 HFS volume checked
Volume needs repair

Disk Utility could not repair it so I used the "fsck_hfs -r" method in the original post. After running this disk repair sequence several times, the disk would not remount using Disk Utility. At this point, I had an unmountable disk. Disk Utility couldn't repair it, fsck_hfs couldn't repair it, Disk Warrior said it was damaged too badly and couldn't repair it so I was thinking I would have to send it out to a repair shop. As I am thinking of all my good intentions to back up 100 GB of photos, songs, and everything else digital that I own, I had one final idea. I booted up my G3 B & W in OS 9.2 Classic which I had installed way back when OS X was first introduced. The disk mounted in OS 9 and everything looked great. I ran trusty old Disk First Aid and it fixed many problems before announcing the repair was SUCCESSFUL. And on the next boot up of OS X, the external Maxtor disk mounted and everything was fine again. Hope this solution might help someone that had a scary experience like I did trying to fix something that didn't need fixing.

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