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

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Ubuntu 14.04, ext4 remounts read-only 10-30 minutes after hibernate

After waking the laptop from hibernate, it successfully resumes. There are no errors in /var/log/pm-suspend.log and the filesystem is mounted read-write. After 10-30 minutes of regular use including ...
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How to recover data from a thrice formatted HDD?

So, long story short... My brother wanted to play the pc technician and went on and formatted our main computer. I had Ubuntu 14.04 LTS on a ext4 partition running there, hoping he wouldnt be so eager ...
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Cannot install Ubuntu 14.04 on new SSD - the ext4 file system creation in partition #1 (0,0,0)(sdd) failed

I'm a linux noob trying to install ubuntu 14.04 to a new 120 gb Kingston SSD. I'm aware there are other questions relating to this but I cannot find anything useful. Apologies if I have overlooked an ...
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Resize ext4 Partition to >2TB without data loss

Is it possible to resize an ext4 partition to >2TB without data loss? I added 1TB disk from a RAID 5 Hardware RAID (from 2TB usable to 3TB usable) fdisk command output: Disk /dev/sdb: 3000.5 GB, ...
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32 views

Modify size .ext4 file

I'm currently trying to modify the partition table for an embedded platform. One of the files flashed towards the platform is an .ext4 file. I can mount the file, but I can't increase it's size. ...
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How can I mount an external drive with the permission to execute programs from it?

I wanna mount my USB HDD formated as EXT4 to let say /home/user/exe where there will be executable files. when I mounted my HDD there it mounts fine but I can't run any executable file from there I ...
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/proc/fs/jbd2/partition/history - how to enable?

I have the /proc/fs/jbd2/partition/info file that produces the summary of what happened in the partition's journal so far, but I am not able to see the history file. It doesn't exist. What should I do ...
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ext4 to btrfs conversion: how long can it take? space requirements?

I started btrfs-convert for my ext4 partitioned hdd. I did a fsck first which was fine. So since it is running over 4 hours now (1.) I wonder if it will ever finish ? I read multiple articles ...
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Disk allocation

I installed ubuntu 15.04 and used entire space(640 GiB) for ext4 partition but now it is showing that used space = 30.91 GiB, free space = 24.96 GiB and 536.40 GiB unallocated space. I tried to extend ...
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fsck took only two seconds to report “clean”. What did I do wrong?

I booted a LiveCD (Ubuntu 14.04.2) and opened a terminal window. I used sudo lshw | more to determine that my usual boot volume was logically named /dev/sda1 . It's the primary partition on a 1 ...
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How do I enable extended attributes on ext4?

I want to experiment with Ceph, and it needs extended attributes enabled. How do I mount my filesystem with this support?
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Cannot boot to SteamOS after upgrade to 15.04

A quick overview of my system: I have Ubuntu, Windows 8.1, and a Debian-based OS (specifically SteamOS) all installed. All of them booted just fine before yesterday. Yesterday, I upgraded to Vivid ...
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How can I convert my root partition from BTRFS to EXT4?

Is it possible to convert btrfs to ext4 without losing data? I'm experiencing a very low speed on read/write operations on btrfs.
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I can't create both Swap and Ext4 partition

I installed Ubuntu using the dual boot method. My laptop is HP pavilion DV6. It has MBR on my HDD, so I'm limited to create 4 primary partitions. In Windows 8 I have used 4 primary partitions. In the ...
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undelete files on ext4

My mother has placed some important files on her /tmp per accident. Now, of course, they are gone. This happened yesterday (2 boots of the machine since) I want to try to undelete the files. They ...
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How can I optimise ext4 for reliability?

As ext4 was introduced as more reliable than ext3 with block journals, is there any chance to suppose it 100% reliable? What if enabling block journaling on it, which is disabled by default? As ...
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51 views

Manual Partitioning During Installation: Understanding File System Types

I am wondering if anyone can help me understand the difference(s) between the different file system types: ie. swap, ext4, reiserfs, etc... I am working with the manual partitioning during ...
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Ubuntu Server 14.04.2 LTS restarts continuously

is my first time asking here, so, congrats for the forum, is very instructive! I have an Ubuntu Server 14.04.2 LTS (64bits), and when Im working with that, I don't know exactly why, it restart again ...
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Move ext4 partition

I have an ext4 partition at the end of an hard drive, and want to resize it to the full disk size (the rest of the disk is empty). It's not the root partition, just a data partition, so it's no ...
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Windows 8 install turned my ext4 partition into unallocated space. How do I recover it?

The unallocated space in sda2 is supposed to be an ext4 partition with my ubuntu install in it. How do I recover this from a live CD so I can back up my data?
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Error mounting SCSI drive on Ubuntu Server 14.04

I'm trying to mount a SCSI Drive on my Ubuntu 14.04 server. To mount I entered this in the Terminal: geza@Server1:~$ sudo mount -t ext4 /dev/sdb /media/sdb mount: wrong fs type, bad option, bad ...
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Problem with EXT4 in Ubuntu 14.04

I tried to create a file system EXT4 on flash drive, and I failed. The resulting file system was not mountable. Mount gave an error. In addition, I formatted the drive in other distribution in EXT4 ...
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How can I create an EXT4 partition with an extra large number of inodes?

About inodes In Ubuntu, each file and directory is a so-called inode. You can use df -i to check the number of inodes in use and available for all mounted filesystems. Question If you create a new ...
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mounting drive remotely on server

I'm doing a school project and we've been given access to some servers, so we can build a simple Cassandra database. I need to mount a drive on each instance -- there are four instances. The ...
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Recover from a corrupted filesystem when fsck do not help

Something went wrong with my filesystem, Ubuntu set it to read-only and now under Ubuntu Live Disc, fsck can't fix it. I'm running 13.04 and it won't boot - at startup, it just shows the grub rescue ...
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Formatting 128GB SD card to ext4 with gparted

I am trying to format a SanDisk 128GB SDXC card plugged into the internal SD card reader on a Toshiba Chromebook 2 running Crouton. When I format to ext4 using gparted the operation never completes, ...
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Cannot write on ext4 partition Ubuntu 14.04

I formatted the disk in my computer as ext4. Now I'm trying to make it readable and writable for any user on this computer. My entries in /etc/fstab look like this # Data partitions ...
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Running ubuntu from ext4 formatted USB drive?

The "Make Startup Disk" ubuntu utility sees it as writable only if it's fat formatted. If I format it to Ext4, it sees it as 0 free space and doesn't allow to click "Make startup disk" button. ...
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61 views

Main data drive giving I/O errors

My main data drive is throwing up all sorts of weird I/O Errors: (tail of dmesg output) [ 7081.267852] sd 4:0:0:0: [sdb] Unhandled error code [ 7081.267856] sd 4:0:0:0: [sdb] Result: ...
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49 views

what free percentage is good for a partition to maintain? [closed]

The use% of most my partitions (including /,/home, and two ntfs partitions shared between Windows and Ubuntu) are more than 90%. Now I plan to replace my hard drive with a bigger one, and install a ...
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ext4 partition lost after windows installation.How to recover it?

My disk had two partitions one was an extended partition containing my root and swap space and the other was an ext4 partition. Recently I installed windows 8.1 on it by shrinking the ext4 partition ...
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Why are ext4 filesystems owned by root?

I formatted a flash drive to ext4 and created a new partition on my hard drive with fs type ext4. Both were owned by root and I had trouble writing files. Why does that happen? Also, if that has no ...
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how to exchange unusable space to ext4 in ubuntu 14.04 installer?

I am trying to install ubuntu 14.04 along side with windows 8 : when I try to create an ext4 partition after creating one ext4 and swap , remaining space changed to unusable how should I prevent ...
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Which tool to backup an ext4 partition?

I'm searching for a tool to backup a whole ext4 partition to an image. I tried the latest version of mondo, which is not working. What are good alternatives?
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447 views

Full internal harddrive converted to ext4 file system, how to install Windows back again? [duplicate]

I had Windows 7 installed on my laptop, with hard drive partitioned. I installed Ubuntu formatting the drive as it didn't detect I had Windows 7 too already. It installed correctly, but now when I'm ...
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Explanation of entries in dmesg log in Ubuntu Server 14.04

A few days ago I did a clean install of Ubuntu Server 14.04. Everything is working fine, but when my system boots I get these entries in dmesg log: [ 3.106082] EXT4-fs (dm-0): mounted filesystem ...
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177 views

Is it advisable to install Ubuntu on btrfs or ext4? [closed]

I used to install ubuntu on ext4 but I heard about btrfs. Is it advisable to use it for Ubuntu installation? What are the pros and cons?
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how to extend root (/) partition by freeing ext4 partition? [duplicate]

My root (/) partition is full and i want to extend my root file system by freeing extra memory present in other partition which is ext4. How to free some space with ext4 allocation and how to extend ...
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Ext4 constantly mounts as read-only

I'm at a complete loss, here. After only using my computer for short periods of time (often less than a minute), my root partition (Ext 4, /dev/sda5) become read-only without warning. This happens ...
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Unable to write to ext4, No space left on device?

After creating a folder in my ext4 partition, copying some data to it, then moving that whole folder to another drive, I became unable to add additional data to the ext4 partition when I boot into ...
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EXT4-fs errors and sd errors. Rejecting I/O to offline device

System Configuration: Ubuntu 12.04 server 64bit HP Proliant dl140 g3 32gb of RAM Intel X5365 quad core 3GHz LSI SAS1068 2x WD black 2TB SATA HDDs in RAID 1 Errors: [ 2044.430919] EXT4-fs (sda1): ...
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Where are the headers with IOCTL numbers for ext4?

I am looking for ext4.h, or another file that contains EXT4_IOC_*. There is nothing in /usr/include or /usr/src. I have linux-headers-generic installed. I am on Kubuntu 14.10. Where are the headers? ...
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How to check a mounted filesystem for errors in a reliable way

Following this question: Force fsck.ext4 on reboot, but really "forceful" Apparently the output of e2fsck -n is not reliable when you use it on a mounted filesystem, so its output should not be ...
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What does the 'jekyll 2.4.0 | Error: Permission denied - /sys/fs/ext4/sda1/trigger_fs_error' mean

I am trying to run a Custom GitHub Pages with Jekyll, but every time when I run bundle exec jekyll serve I get the below error: jekyll 2.4.0 | Error: Permission denied - ...
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Unable to Mount ext4 filesystem: bad block size 65536

root@vagish-SVL24115FAB:~# lvdisplay --- Logical volume --- LV Path /dev/vg1/lv1 LV Name lv1 VG Name vg1 LV UUID ...
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New ext4 partition and used space

I have fresh ext4 partition, which means I just formated it with mkfs.ext4 -m 0.1 /dev/mapper/abak-home, and there's already 27G space used. Setting reserved root space (-m) to 0 didn't have any ...
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How do I create and tune an ext4 partition from the command-line?

PARTITIONING (e.g. fdisk) What are some useful commands used for partitioning an additional hard drive from the command-line? Since most published guides steer towards GParted and other graphical ...
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Partitioning my system [duplicate]

How can I create a 500 Mb partition formatted on ext4 via command line ? Is this possible ? I'm trying to get accustomed with the terminal on Ubuntu 14.04.
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2answers
6k views

How do I create an encrypted filesystem inside a file?

Recently i've found this interesting tutorial: http://flossstuff.wordpress.com/2011/08/07/using-a-file-as-a-storage-device/ It explains how to create an empty file, format it as ext4, and mount it ...
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376 views

Disabling Journaling in Ubunu 14.04?

I installed Xubuntu (sometimes running Cinnamon, but I digress) and would like to disable journaling on in order to make file-shreddingthe ext4 system partition in the system partition more effective ...