Repairing file system.Volume is already unmounted.Performing fsck_msdos -y /dev/rdisk2s1** /dev/rdisk2s1

MacBook Pro 13″, macOS 10.15

Posted on Nov 26, 2021 1:15 PM

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Can a unmounted volume be repaired? Disk Utility First Aid shows volume “unmounted, operation failed”. Can this be repaired?
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Corrupted Drive Is there any way to fix this problem without making a new drive? Here is the report: 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/rdisk2s5 Checking the container superblock. Checking the fusion superblock. Checking the EFI jumpstart record. Checking the space manager. Checking the space manager free queue trees. Checking the object map. Checking the Fusion data structures. error: fusion middle tree: invalid "from" range 0x4000009da6de3:2 Fusion data structures are invalid. The volume /dev/rdisk2s5 could not be verified completely. File system check exit code is 8. Restoring the original state found as mounted. File system verify or repair failed. : (-69845) Operation successful. I tried running first aid in recovery and it came up with the same error.
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Strange issues with external USB SSD I have all of my games on this external hard drive, and I went to open X-Plane 11 today and it wouldn't open because there were a few files it could not locate. I ran the X-Plane updater to replace the files but the installer wouldn't run because the drive is apparently in read only mode. I ran first aid on disk utility and that failed. It said: Running First Aid on “X-Plane11” (disk4s1) Repairing file system. Volume was successfully unmounted. Performing fsck_apfs -y -x /dev/rdisk4s1 Checking the container superblock. Checking the space manager. Checking the space manager free queue trees. Checking the object map. Checking volume. Checking the APFS volume superblock. The volume X-Plane11 was formatted by diskmanagementd (945.241.4) and last modified by apfs_kext (945.260.7). Checking the object map. error: om: btn: invalid o_oid (0x16b1) Object map is invalid. The volume /dev/rdisk4s1 could not be verified completely. File system check exit code is 8. Restoring the original state found as mounted. File system verify or repair failed. Operation failed… What can I do about this? Disk utility said to back up the data but I don't have another hard drive with enough capacity to copy the files over.
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1 reply

Sonicray

Level 5

4,556 points

Nov 26, 2021 2:09 PM in response to pun20

Ok, What is your question?

https://support.apple.com/en-us/HT210898

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Repairing file system.Volume is already unmounted.Performing fsck_msdos -y /dev/rdisk2s1** /dev/rdisk2s1

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