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Disk First Aid finds 8 warnings and corruption of "Data" drive. Same problems detected after repair and repeat.

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Disk First Aid finds 8 warnings and corruption of "Data" drive. The same problems are detected after repair and repeat. I have repeated the process at least 5 times in Safe Mode. The messages from Disk First Aid is identical each time.


It's an editing machine. Heavy disk use. 8TB SSD. Files are acting strange. It takes forever to move things to the trash. Certain files are not syncing to G Drive, etc. I have backups in the cloud, but I'm on deadline so I have a fresh 8TB Macbook Pro I could transfer the data to. If the drive is corrupt will the backup be corrupt? I would love advice on the best way to move forward.


Running First Aid on “Data” (disk3s5)


Verifying the startup volume will cause this computer to stop responding.


Verifying file system.

Volume could not be unmounted.

Using live mode.

Performing fsck_apfs -n -l -x /dev/rdisk3s5

Checking the container superblock.

Checking the checkpoint with transaction ID 36927808.

Checking the space manager.

Checking the space manager free queue trees.

Checking the object map.

Checking the encryption key structures.

Checking volume /dev/rdisk3s5.

Checking the APFS volume superblock.

The volume Data was formatted by newfs_apfs (1934.101.3) and last modified by apfs_kext (2235.41.1).

Checking the object map.

Checking the snapshot metadata tree.

Checking the snapshot metadata.

Checking the document ID tree.

Checking the fsroot tree.

warning: inode (id 372438842): Resource Fork xattr is missing for compressed file

warning: inode (id 372462832): Resource Fork xattr is missing for compressed file

warning: inode (id 372706395): Resource Fork xattr is missing for compressed file

warning: inode (id 372862709): Resource Fork xattr is missing for compressed file

warning: descendants (10896) of dir-stats object (id 5710008) is greater than expected (10858)

warning: physical_size (7995392) of dir-stats object (id 5710008) is greater than expected (6041600)

warning: descendants (10107) of dir-stats object (id 264075896) is greater than expected (10103)

warning: descendants (10105) of dir-stats object (id 264075905) is greater than expected (10101)

warning: descendants (10102) of dir-stats object (id 264075907) is greater than expected (10098)

Checking the extent ref tree.

Checking the file key rolling tree.

Verifying volume object map space.

The volume /dev/rdisk3s5 with UUID 36B82E34-F92B-43E0-9BB1-A881259F7292 was found to be corrupt and needs to be repaired.

Verifying allocated space.

Performing deferred repairs.

The volume /dev/rdisk3s5 with UUID 36B82E34-F92B-43E0-9BB1-A881259F7292 appears to be OK.

File system check exit code is 0.

Restoring the original state found as mounted.


Operation successful.


Mac Studio

Posted on Mar 21, 2024 7:52 PM

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Question marked as Top-ranking reply

Posted on Mar 22, 2024 7:51 AM

I read that report with interest. it seems to indicate four compressed items in the directory (whether these are directory items or user files is unknown) may be damaged, and several other directory-stats objects may be damaged as well.


Later it claims to have made 'enough' repairs to proceed. Disk Utility is very conservative, and it generally will not Mount a drive that has ANY potential to lose User files.



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Question marked as Top-ranking reply

Mar 22, 2024 7:51 AM in response to Matthew Lundstrom

I read that report with interest. it seems to indicate four compressed items in the directory (whether these are directory items or user files is unknown) may be damaged, and several other directory-stats objects may be damaged as well.


Later it claims to have made 'enough' repairs to proceed. Disk Utility is very conservative, and it generally will not Mount a drive that has ANY potential to lose User files.



Mar 22, 2024 7:54 AM in response to Matthew Lundstrom

<< I have backups in the cloud >>


"On the cloud" is great for sharing photos, but is not a viable backup solution for everything you have. The stuff is not under your control, and is subject to sloppy handling, arbitrary changes in policy, theft, accidental deletion, data loss [are they making frequent backups using best practices?], and discontinuation or throttling of the service. It can easily take three days to restore it at ordinary Internet speeds.


If you do not have a recent local, disk-based backup, your computer is like a ticking Time bomb. You are only one disk failure, one crazy software, or one "oops" away from losing EVERYTHING! 


Mar 22, 2024 12:25 PM in response to Matthew Lundstrom

<< do you have advice moving forward/ >>


Later it claims to have made 'enough' repairs to proceed. Disk Utility is very conservative, and it generally will not Mount a drive that has ANY potential to lose User files.


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[in my opinion] this is not an emergency, and your backups are likely to be just fine.


If this were mine, I would use the earliest CONVENIENT opportunity to re-image that drive. But I would not knock over furniture to do so. Not required now, but it would bother me to see it continue in the long run in a less than perfect state.

Disk First Aid finds 8 warnings and corruption of "Data" drive. Same problems detected after repair and repeat.

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