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Need to repair Time Machine back-up drive

362 Views 1 Reply Latest reply: Jan 25, 2013 8:52 AM by BGreg RSS
NKat Calculating status...
Currently Being Moderated
Jan 25, 2013 7:22 AM

I have an external back-up for my Time Machine. I think the power went out while it was backing up, and now I can a message that the drive is "read only" or "unavailable." I've tried to fix it using Disk Repair, but I get this message:


Verify and Repair volume “Time Machine Backups”

Checking Journaled HFS Plus volume.

Detected a case-sensitive volume.

Checking extents overflow file.

Checking catalog file.

Missing thread record (id = 129447065)

Missing thread record (id = 129447066)

Invalid node structure

Rebuilding catalog B-tree.

Disk full error

The volume Time Machine Backups could not be repaired.

Volume repair complete.Updating boot support partitions for the volume as required.Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.


Is there anything else I can try before I reformat the disk and start over with my backups? Thanks!

  • BGreg Level 6 Level 6 (17,500 points)
    Currently Being Moderated
    Jan 25, 2013 8:52 AM (in response to NKat)

    If you have Disk Warrior, that would probably fix it. It's the go-to program of choice to repair errors like that. Of course, it's alot cheaper to just reformat the drive ... I'd probably write zero's to it to ensure it's fresh (also resets the bad sector table).


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