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I'm running fsck_hfs on a very large volume. Unfortunately, there's an issue it appears to be unable to fix -- it reports it, loops back to start with Rechecking..., and reports it again, ad infinitum.

** Checking catalog hierarchy.
   Invalid volume directory count
   (It should be 513997 instead of 513998)
   Incorrect folder count in a directory (id = 27444570)
   (It should be 1 instead of 0)

I've tried adding the -r ("rebuild catalog btree") flag to fsck, but the issue still recurs.

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migrated from serverfault.com Sep 19 '12 at 17:08

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1 Answer 1

The volume is probably locked, so you should retry what you are doing after booting into either the Recovery HD parition (Command-R while booting) or with a OS X install CD.

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Checking the mount table, the volume is certainly not mounted anywhere (not even read-only). –  Charles Duffy Sep 20 '12 at 20:24

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