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Questions tagged [fsck]

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How do I fix a sparsebundle that does not fsck but mounts?

I have an old Time Machine sparsebundle that fails to fsck but mounts. Can it be made clean? Can it be copied at the file level while preserving the link tangle that is a Time Machine backup? What ...
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  • 133
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87 views

SSD APFS Corruption

I'm using a Mac Book Pro mid 2012 running 10.15.7on Samsung EVO 1TB internally. It was not possible to boot the computer last Friday. I tried to boot in recovery mode, the SSD was not identified as a ...
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  • 101
1 vote
0 answers
35 views

2 External drives with the same error

Why would I get the same FSCK error on 2 different external drives? About a year ago I archived some important data (photos, etc) onto a 3TB external drive and then copied it (terminal copy command, ...
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1 answer
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What is the difference between erase and restore on Disk Utilily Mac? [closed]

Got a bit of vocabulary confusion. I want to re-format an external hard drive. But I'm not sure what the difference is between restore or erase. Does erase, removes all files. or not. I don't want to ...
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1 vote
1 answer
102 views

How to do after fsck_hfs fails to repair "invalid directory count" after 3 attempts multiple times?

I have an OsX installation that doesn't get past the apple logo. The progress bar loads and then shuts down midway. I have rebooted as single user mode and noticed that /sbin/fsck -fy complained that ...
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  • 153
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0 answers
711 views

Error - Space Manager Invalid

My computer was stuck in a boot loop so I connected the drive to another computer and ran fsck. i get the error "failed to read spaceman cib 0xfcfe" "Space manager is invalid" &...
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  • 103
2 votes
1 answer
3k views

MacOS Catalina, Disk Utility: "Unable to perform deferred repairs"

Upon running Disk Utility against `Macintosh HD - Data", I get the following towards the end of the check: error: dstream (id 8753874978) does not have an associated dstream id object Verifying ...
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0 votes
1 answer
1k views

Mac OS unfixable disk errors (Mismatch between extentref and fsroot & alloced_size of dstream does not match calculated size)

I'm trying to install Windows along side my Mac OS (Catalina 10.15.15). I'm using bootcamp, but it always get stuck at partitioning, telling me it can't partition the disk and check it and fix it with ...
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  • 101
1 vote
0 answers
343 views

How do I rebuild the catalog on time machine backup hard drive?

My Time machine backup drive has started giving me these errors on doing a fsck. How can I rebuild the indexes on this drive? I just upgraded to Mac OS Mojave 10.14.6. The drive has 2 partitioned as: ...
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  • 2,216
4 votes
2 answers
32k views

fsck_apfs not working from terminal in single user mode

I am trying to fix errors on my MacIntosh HD Data volume. I have tried to fix using Disk Utility from normal mode and from recovery mode. Same problem. DI hangs at a certain point and that's it. I ...
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  • 2,107
1 vote
0 answers
404 views

fsck_hfs invalid key length

The HDD is a brand new MyPassport WD 4Tb. I recently used it as my main backup and before I had the time to reformat another drive for a second backup (which means that some data on that drive are ...
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4 votes
3 answers
5k views

External disk is hijacked by fsck when plugged in to Macbook

External disk (2 TB Seagate) is captured by fsck when plugged into a USB 3.0 port on my Macbook Pro (macOS Mojave 10.14.5). This has been discussed by @ArielAllon, and indeed, when I kill the fsck ...
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1 vote
1 answer
224 views

Can I speed up Disk Utility First Aid by running “fsck_hfs” with the “-c” option?

I ran Disk Utility’s First Aid on a portable hard disk I use for Time Machine, which took around 13 hours (with no repairs being needed). I was wondering whether there’s a way to speed that up. Disk ...
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1 vote
1 answer
2k views

How am I supposed to fix a disk from single user mode?

I have an orphan directory on my main disk. I restart the computer in single user mode. In single user mode, the main disk / is mounted as read-only. I type /sbin/fsck -fy. fsck points the problems ...
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  • 2,107
1 vote
2 answers
108 views

MacBook Pro showing Username and Passwordfield though unencrypted

I hope i am posting in the right place because i am really desperate. Since yesterday at noon, when i woke up my mac by lifting the screen, it stopped showing me my usual username, asking for my ...
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2 answers
2k views

exfat fsck crash on macos 10.14.4. Any workaround or fix?

I am trying to mount an external HD with exFAT, but apparently the latest unmount was non-successful, and now the disk requires an automatic fsck. When macos tries to perform the fsck, this happens ...
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3k views

Disk Utility First Aid in recovery failed to restore volume to original state

I was trying to repair permissions today on my Mac so I ran the Disk Utility's First Aid on my drive and it said that there was an Invalid Index Key and that my disk was corrupt and I needed to run ...
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  • 101
-1 votes
1 answer
55 views

How do I Undelete a Bootcamp drive back to NTFS

I have a recently formatted an (MS-DOS)Fat disk inside my mac. The problem is, this was my BOOTCAMP drive formatted in NTFS. I have read a bit on how to use fsck to (undelete) a drive and watched a ...
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6 votes
1 answer
15k views

APFS: fsroot tree is invalid after Time Machine backup - how to recover and avoid in the future?

System MacBook Pro, late 2013, 1 TB SSD (brand new, recently replaced by Apple), APFS (no journaling, case insensitive), High Sierra 10.13.2, Time Machine to network HDD. What Happened Mac stopped ...
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3 votes
0 answers
1k views

External Hard Drive Corrupted, Invalid Record Count

I have an external hard drive that I unplugged without safely ejecting and now it won't mount. I can see it if I write diskutil list, but when I try to mount it fails. It is a WD My Passport Ultra. ...
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  • 131
13 votes
3 answers
32k views

APFS Errors: fsck can't repair

TL;DR Asked the same question on Apple communities, nothing useful. Find the post here: https://discussions.apple.com/thread/8123614 bash-3.2# fsck_apfs -d -l /dev/disk5 fletcher64_init:58: ...
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  • 2,268
3 votes
2 answers
13k views

High Sierra Freezes on Login

I have a rMBP (late 2012 model) that I recently installed High Sierra on and enabled FileVault (this has apparently been known to cause some similar issues on older version of OSX, but I found no work ...
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1 vote
1 answer
555 views

Strange messages from fsck_hfs

I am trying to check an entire USB external disk that is not erased. For that reason I have typed fsck_hfs -fy -l -S -d /dev/disk1s2 This the result Several messages I found strange here NO WRITE -...
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  • 2,107
2 votes
0 answers
886 views

External hard drive disappeared

I’m currently suffering under my newly bought 6TB HDD. I safely ejected it yesterday and when I plugged it in again, nothing happened. I then checked DiskUtility but was presented with a strange thing:...
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6 votes
1 answer
2k views

fsck_msdos keep blocking external HD

MacOS Sierra 10.12.5 early 2015 MacBook pro 13inch Transcend 1TB Keep doing this since 2015 when I bought both. Every time it is disconnected improperly it hangs a long time upon trying to remount it ...
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5 votes
2 answers
16k views

How do I fsck_apfs an encrypted volume?

I'm playing with macOS 10.13 beta but a volume seems to have been corrupted during migration to APFS. I can boot and log in but soon get a "static screen". I launched recovery mode and launched disk ...
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1 vote
1 answer
2k views

How to run /sbin/fsck -fy on the recovery partition if filesystem is unknown

Disk utility says that there is an unknown filesystem on my harddisk. The main (and only OS) partition seems okay, though. I also checked this via /sbin/fsck -fy in terminal. Unfortunately, this ...
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  • 843
5 votes
1 answer
6k views

Can't boot, fsck -ya in single user says 'Disk full'

My Macbook Pro suddenly turned itself off (I believe I got a popup saying it was soon out of diskspace, but I didn't think this meant "Your OSX installation will soon be unusable"). After this, I ...
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  • 151
5 votes
1 answer
804 views

Why won't an fsck-declared-good volume mount?

I have a CoreStorage logical (virtual), encrypted volume that will not mount, even though fsck_hfs declares it clean. Does anyone know what the deal is here? Here is the drive information: /dev/...
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1 vote
1 answer
1k views

HDD corruption after power cutoff

Yesterday a breaker tripped in the same room as my Mac Pro 1,1 running Yosemite (Hacked boot.efi.) All other machines powered up but this one. Attempting to mount via Target Disk Mode timed out, so I ...
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  • 214
3 votes
1 answer
5k views

diskutil fails to fix Fusion Drive

My iMac suddenly stopped booting, failing to mount the disk at boot. Running diskutil repair fails with this error: bash-3.2# diskutil repairVolume disk3 Started file system repair on disk3 ...
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  • 41
21 votes
1 answer
24k views

Disable the disk check when reconnecting an improperly disconnected disk to OS X

If you disconnect a removable drive without ejecting it first, the next time you connect it, Windows or Mac run an fsck check on the disk to ensure data integrity. Windows will ask if you want to ...
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0 votes
1 answer
235 views

How much free space does fsck need to rebuild the catalog file?

I am in single-user mode, running fsck -fy. It attempts to rebuild the catalog file and exits with a status of -34, complaining of a disk full error. How much free space does the disk need to have ...
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3 votes
1 answer
4k views

Why there is a large lost+found folder on external disk

I brought my MacBook Pro 1 year ago, at that time it runs OS X 10.9 . At that time I connected an external 2TB HDD (HFS+ single partition, not connected all the time) to it via USB as a Time Machine ...
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  • 133
1 vote
1 answer
8k views

Verify disk reports error, recovery os repair + fsck says disk is fine

After my time machine backups got stuck to finish at some point, I decided to do a disk check using disk util. I'm getting the following output while running "verify disk": The volume 86A26AC7-8D39-...
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  • 111
1 vote
0 answers
123 views

MacAIR failing to startup from disk

Running 10.9.most recent. As of this evening my Mac will not start up normally from the internal drive. The Apple logo appears and the spinning disc as well, but nothing happens thereafter. I have ...
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3 votes
0 answers
8k views

fsck not working to fix corrupted external drive

I am using an early 2011 MacBook Pro with the Mavericks OS. I've researched a similar issue on an internal drive but As far as I know, being in Single User mode won't help my situation. One of my ...
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0 votes
3 answers
949 views

screen on my MacBook Pro goes completely black after I log in

I was fixing my Mac partition by rebooting and holding CMD+S and then typing fsck -fy It found some issues and (probably) fixed them. Now when I boot into MacOS after some time the screen goes ...
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  • 1,399
1 vote
1 answer
896 views

fsck_hfs keeps crashing when trying to repair my Time Machine volume

I've got my Time Machine volume (direct attached, USB) corrupted by accidentally flicking the switch while it's running. Now neither Disk Utility nor fsck_hfs can repair the drive. Investigating it ...
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  • 1,203
3 votes
0 answers
7k views

Macintosh HD missing after failed catalog btree rebuilding

There is an I/O error in the hard disk in my MacBook Pro running Mountain Lion and as I start it up, a progress bar fills up and then it shuts down on its own. I attempted to recover the files in ...
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24 votes
3 answers
144k views

What are next steps when fsck reports "could not be repaired after 3 attempts"?

My Mac Book Pro 13.-" doesn´t get past the grey booting screen with the apple and the spinning wheel (The loading bar appears but when it´s done nothing happens) I have 220 GB in one single ...
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  • 241
3 votes
2 answers
11k views

Fixing up a HFS+ filesystem enough to rescue some files

I have a HFS+ formatted drive that just died on me. I have a back up but it's a about a week old. Unfortunately, I have a few files that I've changed and added since then that I would like to rescue ...
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  • 180
4 votes
1 answer
1k views

OS X: fsck_hfs unable to fix volume directory count

I'm running fsck_hfs on a very large volume. Unfortunately, there's an issue it appears to be unable to fix -- it reports it, loops back to start with Rechecking..., and reports it again, ad infinitum....
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2 votes
2 answers
3k views

Mountain Lion Installer detects hard drive damage

I downloaded and ran the Mountain Lion Installer today for my mid-2007 iMac. After rebooting and preparing to install, I receive an error message that the hard disk was damaged and the installer could ...
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  • 938
0 votes
2 answers
2k views

Disk Utility says disk is corrupt after running fsck -fy

Disk utility reports that the disk needs to be repaired. I can't find the original boot disk, so I booted to single user mode and ran: fsck -fy This reported that it fixed a problem, and that the ...
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  • 336
23 votes
5 answers
108k views

Repair disk from single user mode (fsck fails)

Earlier today my 2009 iMac emitted I/O errors trying to copy files. So I ran disk utility, verify disk to see if anything was amiss. It was. But as it's my startup disk I couldn't repair it, so I ...
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  • 423
0 votes
0 answers
1k views

How to "scan disk" or "repair disk" by booting up in single user mode and scan disk?

I think when we are using the Mac, we can't choose "Repair Disk" in Disk Utilty to repair the current hard drive, as the drive is being used. If "Verify Disk" is used, it only takes about 3 to 5 ...
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