MacOS – First Aid found corruption for repair but First Aid from Recovery did not solve the issue

disk-utilitymacos

I am trying to solve this problem on my Macbook Pro 2012, running Sierra 10.12.1. I've run First Aid from Recovery and did not find any corruption, everything was fine. I've run it again from my OS and I still get the problem as follow:

Verifying storage system
Checking volume
disk0s2: Scan for Volume Headers
disk0s2: Scan for Disk Labels
Logical Volume Group 04B93861-2D39-432E-A393-50AD1CE83BFE on 1 device
disk0s2: 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 55E94947-EFBC-473A-A314-5EBEFF0A949A
Load and verify F9FAD274-A819-4CDC-9F05-F519DA8DBED2
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 04B93861-2D39-432E-A393-50AD1CE83BFE appears to be OK
Storage system check exit code is 0.
Verifying file system.
Using live mode.
Performing live verification.
Checking Journaled HFS Plus volume.
Checking extents overflow file.
Checking catalog file.
**Incorrect block count for file processing-3.2.3-macosx.zip.f0fd203b-064b-4fd7-bce4-89d8c693971e**
**(It should be 6452 instead of 28451)
Incorrect block count for file USB_LUCA.zip.40b230dc-a016-4312-afcd-c1a087fcd8a2
(It should be 4630 instead of 530384)**
Checking multi-linked files.
**Incorrect number of file hard links**
Checking catalog hierarchy.
Checking extended attributes file.
Checking volume bitmap.
**Volume bitmap needs minor repair for orphaned blocks**
Checking volume information.
**Invalid volume free block count**
**(It should be 19383016 instead of 9221304)**
*The volume Macintosh HD was found corrupt and needs to be repaired.*
File system check exit code is 8.
Operation successful.

Anyone had the same issue?

Best Answer

When repeated attempts to repair the filesystem fail, your next step is to back up all the files that you need and erase the partition.

Set up a new filesystem and then re-test the repair in recovery. If that fails - your hardware needs repair. If that succeeds with a clean check - you can set up a new account and/or restore from backup.

Live repair is not to be trusted, but live errors are of concern. I would try a verify in live mode to be sure you have issues before going to the erase / re-partition step as that can take some time so you'd rather be sure before starting down that path.

Logical volume groups with one newer non-checkpoint transaction

These may be irreparably damaged.

Verbose safe boot

For my example with two LVGs, Core Storage-related lines suggest that each LVG is damaged:

CoreStorageGlobals() boot args = 0x1
CoreStorageFsck: LVG on disk0s5 is damaged and mounted read-only
CoreStorage: fsck_cs has finished for group "A82B1A4B-B312-41AB-B020-F813CCC74C1C" with status 0x04
CoreStorageFsck: LVG on disk0s7 is damaged and mounted read-only
CoreStorage: fsck_cs has finished for group "902434C9-0131-4E3A-AE15-2B8B938087AD" with status 0x04
thr 0xffffff8008c65aa0 LVG MLV is readonly because metadata is not writable
thr 0xffffff8008e6baa0 LVG MLV is readonly because metadata is not writable
CoreStorageFamily::unlockVEKs() failed to unwrap the vek, status = e00002bc
Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@B/AppleMCP79AHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOBlockStorageDriver/ST750LX003-1AC154 Media/IOGUIDPartitionScheme/OS@5/CoreStoragePhysical/CoreStorageGroup/OS

In this case the failure to unwrap is proper (the volume encryption key used at EfiLoginUI is good for the OS X startup volume, but not for the home directory that's in a separate LVG). That one line aside …

… if we trust what's stated by the operating system in the question and in this answer, then each LVG with a newer non-checkpoint transaction is:

apparently OK
damaged
irreparable.

Approaches to damage

Destruction (deletion) and recreation (erasure)

For me in at least once case (not given here at this time), fsck_cs found a newer non-checkpoint transaction for an LVG that had been created only minutes earlier, by an erasure that included encryption.

So whilst deletion of an LVG followed by creation might result in an LVG where no newer non-checkpoint transactions are found, neither short- nor long-term goodness is guaranteed.

Suggested reading

The most recent edition of FileVault Drive Encryption (FVDE).pdf in the open source libfvde project.

Apple MacBook Air mid-2012

There is some "corruption" on some of your files. Since you already ran the Disk Utility and it came back clean it is telling you that there are no physical errors with your drive. That's the good part.

You have a couple of options:

Run fsck
Do a clean install

Running fsck. You will need to do so in single user mode (hold down Command-S during boot)

You will know that this worked because you will see a black background with a ton of white text scroll down your screen.

When you are done booting, you will see a command line prompt. Enter the following command:

#fsck -fy

(Don't enter the hash tag)

It will complete and tell you that the file system was modified. Keep running the above command until it tells you that the volume is "Ok."

When you are done reboot the computer by issuing the command

#reboot

Your MBP Air will reboot normally the error should go away.

If it dosen't it is time to do a fresh clean install.

There are third party utilities that "may" work here, but I have found they cause more problems than they are worth.

Oh...most important part:

Make sure you have a backup of all your data!!!!