The system utility fsck (from "file system check" or "file system consistency check") is a tool used to check the consistency of a file system in Unix and clones.

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btrfs check: “Couldn't open file system”

When I run btrfs check /dev/sda1, it returns "Couldn't open file system," whether /dev/sda1 is mounted or not. Why? (cf. this)
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Disable automatic fsck_exfat on dirty volume mount in Mac OSX

I've several large hard disks formatted in exFAT to keep clean compatibility between Win7/Bootcamp and Snow Leopard. Here's the problem: fsck_exfat needs something like 6-8gb of RAM to complete on a ...
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fsck scheduled for reboot - ignored?

Recently my server had a power failure which obviously led to hard drive corruption: sudo fsck -n fsck from util-linux 2.20.1 e2fsck 1.42.9 (4-Feb-2014) Warnung! /dev/mapper/pdc_gahfdjcb2 ist ...
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What is the `fsck.ext4 -i` file format?

I have a usb hard-drive that I just reformated as ext4, but which will fail in r/w mounting after a few seconds, remounting in read only. dmseg and /var/log/syslog help me as they provide information ...
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Ext3 drive will not mount after power failure; how to recover files?

After a recent power failure which caused my linux box (Ubuntu 8.10) to rapidly poweroff twice from a normal running state, I have a drive that will not mount. UPDATE: The drive will sometimes ...
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Running fsck from cygwin shell?

I need to be able to check / fix file system errors on SD cards from a win7 box. I had hoped to use e2fsck from cygwin but am having some issues getting this to work. (SD cards are used to boot ...
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Reuse broken disk

My Western-Digital hard drive (WDC WD3200BEVT-80A0RT1) got broken yesterday. I don't care about the data on it, but I want to reuse this disk. As long as I do not have Windows installation DVD anymore ...
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Why does file system get error repeatedly even if I fsck it over and over again (on linux)?

My system is Gentoo Linux (kernel is 3.16.0), my file system is reiserfs. A couple days ago, I unpacked a big tarball which is more than 100MB, and is about 1.3GB and 10,000 files after unpack , then ...
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Find files > 0 bytes in length that consist only of NUL in Debian/Ubuntu

After fsck'ing an ext4 drive that had been running in a QNAP nas without an fsck for about four years, I now have a number of files that seem but be the correct size (typically 8-12mib), but each byte ...
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167 views

Ubuntu doesn't boot after fsck on /

I had this problem with Ubuntu when it boots: http://askubuntu.com/questions/392720/the-disk-drive-for-tmp-is-not-ready-yet-s-to-skip-mount-or-m-for-manual-recove The problem appeared from nothing, ...
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Ext3-formated hard drive is corrupted

I have two hard drives put together to one logical volume. Both hard drives are ext3 formated I'm running rasbian For a few days now mounting the LV failes. I receive the following error message when ...
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What is the difference between fsck and e2fsck?

What is the difference between the linux disk error-checking tools fsck and e2fsck?
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Arch Linux error on boot: “fsck: /sbin/fsck.ext4: execute failed: Exec format error”

I am not sure what this is or how to fix it. This error displays on boot and shortly afterwards everything appears to freeze just before my display manager is loaded. I have also tried chroot'ing ...
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Corrupt disk after fsck for ntfs

A while ago, I found out that I could not use my 2TB type 07 (NTFS) USB disk when connected to a computer with a Windows boot. Disk had only one partition. However, I could mount and use it under ...
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560 views

RPi kernel panic with Raspbian

Some background: my RPi has been randomly shutting down since pretty much ever, I just reboot it (unplug / wait 1-2 minutes / plug) and it usually works again. I've never been able to trace the ...
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766 views

Prevent e2fsck from running out of memory?

I have a box running Ubuntu 11.10 with 512MB RAM and no swap. It has a 1TB USB HDD with ext3 filesystem attached. Sitting idle, it's only using about 60MB. When I run e2fsck, it runs out of memory, ...
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Perform bad blocks scan on root partition in Linux

My root partition is formatted as ext3 and I would like to perform a bad blocks scan on it. Normally e2fsck -c -c does this, but you can not run it on a mounted partition. I know it is possible to ...
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Mark bad blocks as unusable on NTFS using linux

one of my laptops are using windows and after a certain impact it doesn't boots up anymore, I figured the disk might've been damaged. So I've launced live Kali linux and scanned it with badblocks ...
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206 views

Proper way to run (e2)fsck on a server I am diagnosing?

I was reading an old sysadmin manual and it said to use the badblocks program to feed e2fsck with the -l parameter the bad cylinders, but newer "guides" are saying to use the -c switch instead. I am ...
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380 views

Hard disk very slow, failing with more and more errors

Since a couple days, my Seagate Momentus 7200.4 has been failing more and more, possibly because of a power outage. After the "WARNING: Your hard drive is failing" (I'm using fedora), the main symptom ...
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161 views

After power failure SSD behaves strangely

SSD contains 2 partitions. I can't mount root partition(ext3) and can mount home(ext4), but I can't fsck any of them, I get same "fsck.ext(3,4) Input/output error" for each. I'm sure there was minor ...
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fsck: Options for most thorough disk check

I've got a disk with a known problem (I know because dd gags when I try to clone it). But when I boot with a live CD and run fsck on the unmounted partition, I get this: ubuntu@ubuntu:~$ sudo fsck ...
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fsck -y breaks system

I have a Red Hat development box and I recently had an outage where the SAN disk was unavailable and and some applications were not running right so I ran fsck -y to check if the file system was ok, ...
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Is it safe to disable fsck on boot?

Occasionally fsck would run on it's own when I reboot my server, but most of the time it doesn't. But when it does run, it takes too long to finish. Is it safe to disable this permanently?
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578 views

Mac: I/O Error when checking extended attributes files

My Macbook Pro has stopped booting, so I went into single user mode, and did this: fcsk_hfs -Re. However, it always stops at this point (I tried like 30 times): Checking catalogue file. Checking ...
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What's the purpose of the Linux filesystem checkers' “interactive mode”?

Linux's fsck disk-repair tool often runs in an "interactive mode" by default. This means that, if it finds problems, it may ask me questions. But these questions tend to assume that I am a filesystem ...
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Forcing a verbose fsck on reboot (Ubuntu)

I'd like to force a verbose fsck on reboot of my Ubuntu linux server, I can get fsck to run on reboot by creating a file /forcefsck in my root dir ... Additionally, by adding a y into the contents of ...
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888 views

Prevent fsck on every boot

I'm analyzing boot times with systemd-analyze and, after optimizing it as far as I could, I noticed fsck-ing every partition on boot sometimes take up to 20 seconds. I feel it's unnecessary since I ...
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setting system time at startup from ext4 filesystem

I have a pc with no battery backup and using ubuntu 12.04 with ext4 it will constantly ask me to handle the situation by saying that my superblocks last write is in the future. So I wonder - can I ...
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3k views

What are “Missing thread recordng” erros when running fsck -fy?

There is some error reported when I run Disk Utility and verify the root volume on my OS X MacBook. So I boot and CMD-S into the shell mode and run /sbin/fsck -fy. Errors are like: ** Checking ...
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About fsck and a HDD's reserved space for bad sectors

So when you do a full fsck on a hard drive to find bad blocks, does it ignore or exempt that space on the drive where it puts (reallocates) bad blocks into? I'm talking about the space implied by the ...
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Does the number of files affect fsck's performance?

Will a 100GB disk with 1,000,000 files take longer than a 100GB disk with 100 files when running fsck?
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How to run fsck on an external drive with OS X?

I'm getting this error when trying to repartition an external drive: "". I want to run fsck -fy on the drive, but don't know the proper syntax for doing it on an external drive? Can anyone help ...
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538 views

Linux, corrupted file, ran fsck, file still corrupted

Here's my situation: I have a server running Ubuntu Server 9.04 I copied a file on the server and was able to access the file from a Windows client computer without any problem. Then recently I ...
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269 views

Frequent Mac lockups due to fsck_hfs

My Macbook Pro (10.6.8) locks up every day at noon for several minutes (and often after sleep). I put 'Activity Monitor' up front right before noon sorted by %CPU, and saw that it ran 'fsck_hfs'. ...
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How can I repair the OSX root partition without the original disk?

I used /Applications/Utilities/Disk Utility.app to check root partitions for problems and Verify Disk function said there were some issues. But there seems to be no way to run Repair Disk - it wants ...
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Can you run “fsck.ext2 -fycc /dev/mapper/truecrypt1” on an unmounted Truecrypt device?

Can you run "fsck.ext2 -fycc /dev/mapper/truecrypt1" on an unmounted Truecrypt device? The "extra c" in the -fycc causes it to do a supposedly "non destructive" read-write (Similar to what ...
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Bad blocks detected by fsck. SMART says disk is good

Using Ubuntu 12.04, I booted into maintenance mode and selected fsck from the menu. This ran a filesystem check on all my volumes (all ext2), mounting them read/write by default. After the tests ...
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backing up restricted folder

my MacBook just died and I have really important data on my Macintosh HD. So I try to do a backup using Ubuntu 12.10 (Windows does not recognize the Volume as it is HFS+ Journaled, may also be a Win8 ...
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fsck did not recover all files - anything else to try or fresh install?

yesterday a server of mine (debian) went into read-only mode because of problems with the main device (ext3). I contacted the hosting support and the guy told me to boot into rescue and do a fsck on ...
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break out of e2fsck on boot

Is it possible to somehow break out of e2fsck on boot? My system runs e2fsck every 30 days, which is fine by me and I want it to stay that way. But sometimes when I turn on the computer and 30 days ...
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Why won't xfs_check run?

I'm running a fully updated Ubuntu 9.04 "Jaunty" i686 server. I have an single XFS volume in an LVM group called /dev/mapper/vg0-bigthree. If I boot to single user mode and ensure that the volume is ...
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3answers
11k views

How do I prevent a memory card from mounting as read-only in Ubuntu Linux?

I'm using Ubuntu 9.04 and when I try to mount an SD card with the GUI I have to type sudo mount -o remount,rw /media/disk before I can write anything to the card. Is there a hidden setting to make it ...
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fsck from a Windows box

Is there any program that is totally equivalent to fsck for ext2/3/4 partitions and runs in Windows? I need it to scan & repair my Android phone's sd-ext partition on SD. I also know that Windows ...
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How can I run fsck on a disk image via Mac Terminal?

I want to run fsck on a disk image before I use it to restore (replace) a corrupted volume. Using Terminal, what would be the proper command, syntax, and options for this operation? I've just ...
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Cannot run fsck on broken FAT after “unsafe” device removal

I've got an SD card I've accidentally removed without unmounting on an Android phone. After this, the card shows up as having files with garbage names and dates. Seems, that FAT got broken but I ...
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1k views

Can't recover hard drive

My drive got corrupt after a thunderstorm. It used to be 1 partition of 2.5tb but now it shows 2 partitions. It's weird because 300gig free space is about how much it had before corrupting, but it was ...
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684 views

Hard drive partition size wrong. How do I resize without loss of data?

$ fsck fsck from util-linux 2.20.1 e2fsck 1.42 (29-Nov-2011) The filesystem size (according to the superblock) is 610471680 blocks The physical size of the device is 536870911 blocks Either the ...
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1k views

Why does LVM HDD fail “mount” command when booting from CDROM?

Currently I have a superuser post asking if I can install/upgrade existing LUKS/LVM without having to erase and rebuild the partitions. This has provided instructions to mount the HDD, but there are ...
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How to check root partition with fsck?

I installed Linux Mint 12 KDE, and I would like to check the root partition for any errors. How do I check the root partition with fsck at boot time?