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A DIY solution to an invalid node structure problem
Actually i spent a fair amount of time today fixing this very problem on a G5 iMac. And DiskWarrior 4 could not help me it reprted errors and could not unmount the volume (when running from an external firewire drive running OSX 10.4.8) and when run from the DW 4 disk maybe might have fixed something in a few days… maybe but i doubt it i was reporting slow performance due to disk errors but was actualy not going anywhere. Disk Utility (on the Instal DVD) after restting the power management and PRAM quickly reported bad "key lengths" and packed it in. The next try when the drive refused to even mount anymore was invalid node structures. The Apple tech i spoke with said he'd never see anyone recover from this scenario short of the above solution which i'm happy to say did work for me as well.
A DIY solution to an invalid node structure problem
The message you were getting from Diskwarrior regarding a disk error, may have been bad blocks. Though using Disk Utility's "zero data" option sometimes fixes bad blocks, my experience with hundreds of drives has been that at least half the time, bad blocks return on these drives, sometimes immediately, and sometimes only later, making replacing the drive the better solution. I do this routinely even if the drive has one bad block, since drives are cheap these days, and there's no sense in taking chances with your data on a drive that's already proven itself to be in questionable shape. |
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