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A possible fix for invalid sibling links on a hard drive
Authored by: digitaltoast on Oct 13, '08 09:48:33AM

That is a brilliant hint - saved the day here! I was getting really peeved by the brainless fanboys who were doing everything except admitting that it was a Mac problem, even suggesting I waste $100 on DiskWarrior rather than nag Mac to fix THEIR problem with THEIR lame disk system

Anyway, top marks to you - here's the "before and after" result of your solution on my Maxtor 320Gb external drive which is partitioned into two partitions. It was the Time Machine partition which failed after a power cut. (Note: never had NTFS/FAT die apparently unrepairably on a power cut!)

Firstly:
Verifying volume "Rachel Time Machine"
Checking Journaled HFS Plus volume.
Detected a case-sensitive catalog.
Checking Extents Overflow file.
Checking Catalog file.
Invalid sibling link
Volume check failed.
Error: Filesystem verify or repair failed.

Then....
fsck_hfs -r /dev/disk1s3
** /dev/rdisk1s3
** Checking Journaled HFS Plus volume.
** Detected a case-sensitive catalog.
** Checking Extents Overflow file.
** Checking Catalog file.
** Rebuilding Catalog B-tree.
** Rechecking volume.
** Checking Journaled HFS Plus volume.
** Detected a case-sensitive catalog.
** Checking Extents Overflow file.
** Checking Catalog file.
Incorrect number of thread records
(4, 163)
** Checking multi-linked files.
** Checking Catalog hierarchy.
Invalid directory item count
(It should be 108 instead of 180)
** Checking Extended Attributes file.
** Checking multi-linked directories.
** Checking volume bitmap.
Volume Bit Map needs minor repair
** Checking volume information.
Invalid volume free block count
(It should be 49629732 instead of 49843730)
Volume Header needs minor repair
(2, 0)
** Repairing volume.
** Rechecking volume.
** Checking Journaled HFS Plus volume.
** Detected a case-sensitive catalog.
** Checking Extents Overflow file.
** Checking Catalog file.
** Checking multi-linked files.
** Checking Catalog hierarchy.
** Checking Extended Attributes file.
** Checking multi-linked directories.
** Checking volume bitmap.
** Checking volume information.
** The volume Time Machine was repaired successfully.


Finally:
Verifying volume "Time Machine"
Checking Journaled HFS Plus volume.
Detected a case-sensitive catalog.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking multi-linked directories.
Checking volume bitmap.
Checking volume information.
The volume Time Machine appears to be OK.



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