The ext4 or fourth extended filesystem is a journaling file system for Linux, developed as the successor to ext3.

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All ext4 partitions have become unmountable

I am using Ubuntu 16.04. Suddenly all my ext4 partitions in internal hard drive have become unmountable and showing error like *** **Error creating mount point `/media/arghya/HD2': Read-only file ...
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ext4 partition type unknow after restart and cannot be mount

After restarting my pc, I've stuck on error of my /home partition. It cannot be mount. Partition table is unknown. For this partition I had dedicated Goodram ssd 250 gb drive. On this disk there was ...
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lsattr: Permission denied While reading flags on directory

This question is risen from Undeletable directory in lost+found I have a directory which I cannot delete and it seems like the reason of that is wrong attrbiutes ('immutable' on that dir or 'append ...
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230 views

Undeletable directory in lost+found

How can I delete this directory? I did fsck and it has found some garbage, I looked through these files and there wasn't something important. So I've tried to delete the contents of /lost+found and ...
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1answer
78 views

How to resize partition on new installation to make room for additional OS?

I did a complete reinstall today of Ubuntu 16.04 (my SSD was encrypted, which prevented me from resizing the partition. This got old, and I didn't feel like going through the command line mess to get ...
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18 views

copy to ext4 formatted drive HDD until 99.9% full, preventing fragmentation?

In general I do understand how ext4-fs manages it to avoid fragmentation, but one question remains after intense investigations... Situation: I have to copy many files of very different sizes to an ...
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1k views

How do I resize an ext4 partition beyond the 16TB limit?

When attempting to resize and old ext4 Partition that was created without the 64bit flag, resize2fs 1.42 will fail if the new size exceeds 16TB. $ resize2fs -p /dev/mapper/target-device resize2fs: ...
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29 views

My ext4 disk is bigger on the outside

Successfully installed a clean 16.04 onto a Hybrid Disk (Seagate® Laptop Thin SSHD) on an HP Laptop that previously refused to run without Windows. All Ubuntu tools, gparted, disks, nautilus tell me ...
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63 views

converting a usb ntfs drive to ext3/4?

I currently have 3 external USB drives in NTFS mounted to my Ubuntu box that i just took off my windows box. Looking to permanently convert them to a Nix partition but i dont have the spare hard drive ...
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9 views

How to change data parameter in Ext4?

I'm using Ubuntu 14.04 and I want to test my filesystem with IOzone (filesystem benchmark tool). I want to test with data={ordered, writeback, journal}. How can I do this?
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35 views

Partition Errors and Remounts Read-Only when Accessing Specific File

I have a pretty basic system running Ubuntu 16.04, 1 HDD, running a few partitions: sda1 - EXT4 - 100G - / sda2 - EXT4 - 723.5G - /home sda3 - NTFS - 100G - (windows) sda5 - SWAP - 8G Whenever ...
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1answer
38 views

Is using exFat (linux driver) for writing backups safe? [closed]

Using an exFat partition gives me the advantage to be able to read and write on Windows and Mac natively. While Windows and Mac are using the original driver from Microsoft (Apple bought a license), ...
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1answer
119 views

How can an ext4 partition automatically be mounted to /var directory on system start?

Is there a way to ensure that a new partition with an ext4 file system is automatically mounted at boot to the /var directory?
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47 views

Trying to install Ubuntu on USB - “Failed to create system file”

NEVERMIND~ Before I start, I am completely new to Ubuntu and the terminal commands used. I only know a few from what I have tried. I have been working on trying to install Ubuntu on a 31GB flash ...
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32 views

Changing file system back to ntfs

before installing Ubuntu I partitioned one of my drives and then installed it on one of the partitions which I agreed to change to ext4. But now the whole drive seems to be in ext4 so I can't read it ...
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60 views

Partition external hdd for Linux/Mac/Windows/Ps3

So i need 3 Partitions on an external hdd like the following, but i can't get it set up Partition 1: fat32 (Ps3, Windows, Mac, Linux) -> movies etc. Partition 2: exfat? (Mac, Windows, Linux) -> ...
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43 views

Are my files on an ext4 filesystem recoverable after removing the logical volume the filesystem was inside of?

Scenario: The other day I was trying to "unmount" some logical volumes so that I could close the LUKS partition they were inside. I accidentally uses lvremove thinking that was the right command to ...
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20 views

Why IOZone returns random values in my Ubuntu 14.04?

I want to execute IOZone¹ tests in my filesystem (Ext4). I'm using Ubuntu 14.04 LTS in graphical mode. But results seems like more randomic if comparing to results from text mode. What factors are ...
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91 views

How to circumvent hard link creation permission to directories on the same file system

I'm well aware of the difference between symbolic and hard links. I'm also aware of the dangers of creating hard links to directories. Nevertheless, I'm insisting on creating a hard link to a ...
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164 views

ERROR message : EXT4-fs error: ext4_find_entry 1451

I have a dell Xps 15 9550 and I have installed Ubuntu Gnome 15.10 in the UEFI dual boot along with Windows 10. Ubuntu works fine but after running for a while it goes to the black terminal screen with ...
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40 views

How to carefully cut space from disk D and put it for Ubuntu?

I have Windows 10 and Ubuntu 14.04 on my PC where disk D contains a lot of free space, so I want to put this space for Ubuntu ext4 file system. Can you explain me how I should do it? I really don't ...
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20 views

Data recovery - ext4

I'm an idiot because I just "initialized" 2TB drive by mistake in Windows disk manager. So I lost all data. It had only one ext4 partition. I tried to run Testdisk but It didn't help me. Is it ...
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505 views

Error? Ext4-fs (sda6): couldn't mount as ext3 due to feature incompatibilities

In recent weeks, when the attempt system boot Ubuntu, the following information appears on the screen with black background: Ext4-fs (sda6): couldn't mount as ext3 due to feature incompatibilities. ...
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Writemode journalling mode

From what I understand in data mode both inode and file data are stored in journal and in ordered mode only inode data is kept in jounral and removed after file data is successfully written. What I ...
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576 views

ext4 broken file system on ubuntu 14.04.4

I have a desktop computer with Ubuntu Desktop 14.04.4 LTS 64-bit with an attached HDD USB 3.0 4TB Intenso 1 partition ext4 data drive only (no OS or Apps). After a sudden power failure I am unable to ...
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31 views

what percentage of free space should I allot on ext4 volumes

Hi I am wondering what percentage of the ext4 volume I should leave empty,or if that is necessary at all for safe storage on large volumes. I have a 1TB and a 3TB external drives both formatted in ...
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23 views

Expanding ext4 and shrinking NTFS partition

I have my machine dual booted with Linux Ubuntu 14.04 Trusty Tahr LTS and Windows 7 Ultimate both 64 bit. I want to shrink the E:/ i.e. /dev/sda5/ by around 10GB and expand the Ubuntu partition by ...
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94 views

How can I add msftdata flag to an ext4 partition?

I have moved my partitions around to make room for dualboot, and now Windows 10 is on sda1 and sd2, with my linux install on sda3 (boot) and sda4 (home). I would like to access sda4 from my Windows ...
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42 views

Does Ext4 stores owner and group names? Or only IDs?

I am wondering if Ext4 file system stores names or IDs for file ownership information? Most probably the IDs... but that makes another question. Does all Ubuntu versions have standardized IDs for ...
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1answer
36 views

Ubuntu 15.10 doesn't seem to support sparse files

On Ubuntu 15.10 using ext4 when I perform truncate -s 512M test.img du -h test.img the output is 513M test.img however if I run du -h --apparent-size test.img the output is 512M test....
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96 views

Should I format all my drives, internal and external to ext4?

Finally ready to remove my Win7 partition on my Ubuntu Gnome system. I have 3 internal drives with music, movies, and pictures that I will be backing up and formatting. Should I format all my drives ...
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32 views

Expanding partition in Gparted backwards vs. moving backwards and expanding

Which is quicker and safer?: Enlarging a Gparted partition backwards OR Moving the original (smaller) partition backwards, and then enlarge it? Example demonstration Enlarge /dev/sda4 to fill ...
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32 views

ubuntu wont load, partition no mount point or file system

Update 24hrs, took all day. Thanks for all your help. New hard drive, Ubuntu install & then testdisk & maybe e2fsck gained almost full accesss to the failed/blocked ext4 partition (which had ...
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50 views

how to partition the mounted drives in ubuntu 14.04

i've installed ubuntu 14.04 in single boot. My hard disk have 1tb capacity. While i'm trying to install windows in place of the ubuntu it shows no drivers are found error. So i'm decided to partotion ...
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99 views

How to install Ubuntu Desktop on XFS or BRTFS using automatic partitioning?

Currently, when install Ubuntu Desktop, and by choosing automatic partition for a brand new hard drive, there is no way to select which file system will be used for it. It auto-selects EXT4 and the ...
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86 views

Recover unreadable directory on ext4 partition

One of my directories in a ext4 filesystem on my SSD became unredable and I need to recover the files. Here is what I did to crash the filesystem: I accidentally created 1.5 million small files in ...
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1answer
123 views

problem mounting new disk partition

I'm trying to install Arch Linux for a Raspberry Pi 2 according to their instructions on http://archlinuxarm.org/platforms/armv7/broadcom/raspberry-pi-2 on a brand new 64G micro-SD card. I'm doing so ...
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26 views

Directory converted to a file

I have an external HD formatted to ext4. Somehow a directory is now showing up as a file (i.e. it is missing the 'd' in the attributes). fsck does not show any errors. I don't believe that the ...
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2answers
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Does reformatting an NTFS drive to EXT4 remove the fragmented parts of it?

I purchased a 2TB hard drive that was initially formated as ntfs and have been using it on my NAS for a while. I did a scan on it and found out it was a bit fragmented. I didn't want to waste time ...
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61 views

Full disk encryption on multiple drives; ext4 and GPT partition table; enter only 1 key

I'm looking for a tutorial (with clear steps) similar to the following article, but using ext4 and GPT partition tables. Full disk encryption with Btrfs and multiple drives in Ubuntu · Bryce Nyeggen'...
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142 views

ext4 I/O Error after suspend - filesystem readonly

i am using ubuntu 15.10 with kernel 4.2.0-23-generic. It is installed on a compact flash card. Sometimes the system wake up and remount the root filesystem to readonly. I have to repair the filesystem ...
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36 views

Creating a new linux partition to the left of linux partition

When I moved from windows to Linux I thought I may not use it much so I only used some 60gb for Linux. But nowadays I don't touch windows. I would like to move the free space from windows partition ...
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26 views

Ext4 partition problems

I have an 1.5tb external hdd. Yesterday morning it worked well. The system accidentally freezed, and i restarted the system and i cant mount the partition. I removed the hdd from the cage, and used ...
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9 views

Convert NTFS to ext4 and encrypt? [duplicate]

Is there a way for me to convert a "live" drive (i.e. with data on it) from NTFS to EXT4 and then also encrypt it? The drives are USB connected, but not flash disks.
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319 views

Kernel fix for “file system becomes read-only” problem?

This is my first post to this list, but I've spent a lot of lurk time here; helpful place. Over the last 8 months I have encountered maybe 4 times a problem that can loosely be described as "an ext4 ...
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86 views

EXT-fs error that won't let up

I have a Xubuntu 15.10 dual boot with Windows. This started yesterday, I was trying to create a Xubuntu 15.10 USB live disk so I could help a friend. I had errors with it but now my system will ...
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130 views

Cannot fsck or e2fsck to repair disk. dumpe2fs returns “Couldn't find valid filesystem superblock.”

I've been dealing with this hard disk problem all day. External Seagate disk I've foolishly failed to back up still is recognized by PC but cannot be read. When I try to follow the steps here, it ...
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26 views

Cannot access ext4 partition

I created an ext4 partition using Disks application from Ubuntu Live CD But I cannot access it from my Ubuntu system on the same disk. It says: This location could not be displayed. You do not ...
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46 views

Wipe all erroneous inodes

My server recently crashed and left my raid6 with 8x4TB disks in a state where I had to force it to assemble. Two disks had event counters that were way behind, but the remaining 6 disks had the same ...
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75 views

partition - merge two ext4

I need to add free space into my linux partition. Actually I know how to resize NTFS partition but I can't merge with existing ext4. GPart doesn't work also GPartLive Please help