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Past TM backup cannot be repaired

Dear friends,

I am confronting a problem for which I cannot find a solution anywhere.

When I updated from El Capitan to OS Sierra, I decided to do a clean install. I also did a partition in my backup disk and kept the time machine backups. Before installing the new OS, I canceled the ongoing time machine backup, because it started creating a backup of macOS Sierra installation. I shut down, formatted the disk and installed a good clean version of the new OS.

The problem is that sometime in the process, I tracked and foolishly deleted a temporary folder in the Backups.backupdb of the past TM backups, which was the incomplete time machine backup I canceled. This action really messed the time machine which resulted the disk partition to be damaged.

Now, every time I turn on my iMac, I get a message "The disk "X" cannot be repaired" and of course I lost access to my backups. The good news is that there is another folder in this partition which is not damaged, which I can access in a limited time frame until the system unmounts the partition. This folder's files are not damaged. I suspect the deletion of the temp folder caused damage to the backups indexing.

Also another cool fact is that if I find an original file -and not an alias- in the maze of Backups.backupdb, the file is not damaged and can be copied to another location without any problems.

Until now, I have tried disk utility first aid, which cannot fix the partition. Any other suggestions ?

Verifying storage system Checking volume disk3s2: Scan for Volume Headers disk3s2: Scan for Disk Labels Logical Volume Group EE1E8129-84E3-410B-A6B7-168DEBD5FE78 on 1 device disk3s2: Scan for Metadata Volume Logical Volume Group has a 24 MB Metadata Volume with double redundancy Start scanning metadata for a valid checkpoint Load and verify Segment Headers Load and verify Checkpoint Payload Load and verify Transaction Segment Incorporate 0 newer non-checkpoint transactions Load and verify Virtual Address Table Load and verify Segment Usage Table Load and verify Metadata Superblock Load and verify Logical Volumes B-Trees Logical Volume Group contains 1 Logical Volume Load and verify 735C6AD0-E368-4CE8-8145-9787E59F765F Load and verify 2788A7BF-C4BA-404F-B4F0-F9564C55327C Load and verify Freespace Summary Load and verify Block Accounting Load and verify Live Virtual Addresses Newest transaction commit checkpoint is valid Load and verify Segment Cleaning The volume EE1E8129-84E3-410B-A6B7-168DEBD5FE78 appears to be OK Storage system check exit code is 0. Repairing file system. Checking Journaled HFS Plus volume. Checking extents overflow file. Checking catalog file. Invalid sibling link Rebuilding catalog B-tree. The volume Atom could not be repaired. File system check exit code is 8. Updating boot support partitions for the volume as required. File system verify or repair failed. Operation failed…

最後更新：2017-10-18 23:02:35

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