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

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Recovering deleted files on EXT4 disk

I deleted some files and folders on a external disk which I now want to "undelete", the disk uses EXT4 which makes it realy hard for me to make tools like testdisk work. I am using ubuntu 14.0 and I ...
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What is the right way to work with large external hard drives?

I own this external HD. When I sudo fdisk -l I'm given this output: zach@tux:~/code/bing$ sudo fdisk -l WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support ...
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Data recovery (importantly .lrcat files) after formatting ext4 partition to ext4

I wanted to do clean installation of Ubuntu, so I formatted previous EXT4 partition having / mountpoint from older Ubuntu release. I then changed my mind and installed new Ubuntu to another partition, ...
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Formatted Ubuntu partition with ntfs on windows

I was running a dual boot Windows 8.1 and Ubuntu 14.04 till recently. I'd used my F: for linux and I accidentally forgot that and did a quick format on it into ntfs. I had a lot of code on linux that ...
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71 views

Large Sized HDD not recognized correctly?

Hello I have a question with newly installed HDD for my ubuntu file server. Motherboard: P7P55D-E LX<br> New HDD: WD NAS RED 4TB<br> OS : Ubuntu 14.04.1<br><br> ...
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546 views

Fixing "The ext4 file system creation in partition #1 of SCSI5 (0,0,0) (sda) failed

The other day, I was using my gaming laptop (ASUS ROG G750JM) that I got last year when it froze up and shut itself off. When I tried to reboot it has a system 32 error message, since I don't have a ...
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412 views

EXT4-fs error on Ubuntu 15.04 crashing after installing an HDD for extra space, Kernel panic on live USB boot

Earlier last week I went ahead and bought a 1TB HDD so I could store some extra files on my work machine. Now I'm having problems with the system crashing. The first time I got the following error ...
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39 views

unable to log-in normally in ubuntu 15.04

whenever i try to log in its always shows me accpi failed (AMD GRAPHICAL DRIVER). after sometimes its moved to emergency mode . after that i moving to recovery mode to bypass graphical error , i ...
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34 views

Installing Ubuntu without touching the rest of corrupted drive

I have a notebook with GPT and UEFI. This notebook contains Windows 7. But after some problems Ubuntu LiveCD destroyed partition table of this drive and maybe some data. I urgently need this ...
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215 views

Pc wont boot, I'm kinda new to ubuntu and don't know what to do

So I'll press the power button and it will say: [0.482250] ACPI PCC probe failed. starting version 219 [1.938863] EXT4-fs (sda1): ext4_check_descriptors: Checksum for group 4017 failed ...
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How to defrag ext4 file system on Ubuntu 10.04? [duplicate]

I have an Ubuntu 10.04 Server with ext4 as file system. e2fsprogs is installed, but e4defrag is only packaged since Ubuntu 12.04. How do I defrag the file system or how can I install e4defrag? Maybe ...
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block bitmap and bg descriptor inconsistent

The error : [Sun Sep 6 11:15:56 2015] EXT4-fs error (device dm-0): ext4_mb_generate_buddy:757: group 113, block bitmap and bg descriptor inconsistent: 34 vs 33 free clusters [Sun Sep 6 11:15:56 ...
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148 views

ext4magic most powerful syntax?

I am trying to recover some files on a ext4 partition. I use the ext4magic and I can recover some files but not all files. I have used the following syntaxes: ext4magic /dev/sdc1 -r -f ...
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35 views

recover lost files after online LVM resize

I did the following 5 days ago which may have triggered the problem. sudo lvextend -L +20GB /dev/vg1/filme sudo resize2fs /dev/vg1/filme Now I realize, that almost all files disappeared. Only the ...
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293 views

How to find details like whether the mounted filesystem is read only or read-write with details of status related to the disk health?

How to find details like whether the mounted file-system is read only or read-write? In addition to it how to find details of the hard disk or partition health status without affecting the data of ...
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1answer
251 views

ubuntu 14.04 not detecting external hdd ext4

I have a 3TB external hard drive that I have formatted to ext4 using gparted. Now when I plug it into my laptop ubuntu doesn't detect it at all. This is the fdisk output sudo fdisk -l Disk ...
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83 views

Can't unmount ext 4 in gparted

I wanted to add extra swap to my pc I followed lots of tutorials but i needed to make a unallocated partition and for that I needed to unmount ext4 I'm totally new in Ubuntu or linux Anybody a ...
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External EXT4 Partition vanished. Ubuntu 14.08

I've had partitions disappear before and been able to rebuild and recover, this time its different. I have a Seagate 200g drive that is a couple of years old and showing bad sectors. No problem, I ...
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2answers
419 views

Can't create ext4 partition while installing ubuntuGnome 15.04

I tried to install ubuntu Gnome 15.04 on a Sony Vaio laptop currently running openSuse 13.2. The iso's md5 checked out and the usb booted all right, but when I select delete current Os and install it ...
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1answer
96 views

How to change FileSystem from, msdos to ext3/ext4 on a specific drive

I am relatively new to Ubuntu and I have recently added a new 480Gb+ SSD drive. When I attempted to install a program onto the drive it wouldn't allow it to happen and a error would occur. I ended up ...
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164 views

Copying .exe files from ext4 to ntfs

maybe a silly question but.. why cant i copy an .exe file format from linux (ubuntu 14.04) to windows 8.1 without corrupts when i try to execute it? I can copy some others file formats like images ...
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24 views

Recover data from repartitioned SD card?

I had an SD card with an important .cpp file. I forgot about this and repartitioned and reformatted the drive. The drive in question was formatted ext4. Is it possible for me to recover this file of ...
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3answers
94 views

Can't extend root partition even after booting from LiveUSB

After doing some research on how to extend Ubuntu root partition, I tried to extend it using the GParted from a liveUSB session of Ubuntu. But I couldn't extend it. When I right click on my root ...
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54 views

Permission Problems with Newly Formatted Drive

I'm using an old Windows PC as a NAS, it has 3 drives in it. I wiped the system drive and installed Lubuntu but I left the other 2 drives NTFS. Directories on them were mounted as shares using cifs ...
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Does not copy files on partitioned Hard Disk

Recently, I partitioned my SEAGATE 1 TB HDD into four portion (200GB, 200GB, 200GB and 300GB) by gparted. But while pasting any copied file to those disk, error occurred. Also while right click , ...
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1k views

Ubuntu 12.04 Ext4 ext4_dx_add_entry:2006: Directory index full!

I'm having in some servers this warning, I have a directory with millions (20 more or less) of files but according to ext4 documentation this shouldn't be an issue. Any idea how can this affect my ...
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5k views

How to create ext4 encrypted partition on Ubuntu 15.04 with new 4.1 kernel?

Can I create a new ext4 encrypted partition with kernel 4.1 on Ubuntu 15.04?
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536 views

VFS: Can't find ext4 filesystem

I'm using a Ubuntu 14.04 server. There are errors in the /var/log/syslog file, like this: Jun 26 11:25:36 compute4 kernel: [64813.543046] FAT-fs (nbd4): bogus number of reserved sectors Jun 26 ...
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62 views

Mount type always set to none

Wish you a good day! I want to mount a folder with type ntfs or ext2 or ext4 in order to set permissions for files in that. This is how I did: tudinh@Acoustic:~$ sudo mount --bind -v -t ext2 -o ...
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Resizing ext4 partition with ext4 partition on runtime

I have burnt an image on a 32gb SD card and about 28gb was unallocated. I have used the disk utility on the unallocated space and made him ext4 28gb. now, I wish to extended the primary ext4 ...
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Will resizing ext4 partitions with Windows destroy the installed Ubuntu?

As the title says, can I use Windows (7) to resize the ext4 partition Ubuntu is installed on? I dual-boot both Win7 and Ubuntu and want to enlarge the Ubuntu root partition. Is it safe to do this from ...
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156 views

How to get my raspberry pi to recognize my Ext4 formatted HDD

I'm trying to get my raspberry pi to function as a media center. Pretty much everything is working fine, but I can't seem to get it to recognize my ext4 formatted 1TB HDD. Whenever I go to ...
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541 views

How do I mount an SD Card as /home/wb9688 by startup?

I want to mount my SD Card as /home/wb9688 by startup using /etc/fstab. My SD Card is formatted as ext4 and the UUID is 93afcc06-65be-4154-9b20-6593f14f6c93. A normal user must have read and write ...
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How can I repair my LUKS / ext4 file system?

my computer was running the whole night and my only open windows where IntelliJ IDEA and Google Chrome. Today my file system seems completely corrupted. Linux Mint can't read any files and folders ...
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83 views

Ext4 to Ext4 file copy slows down whole system

When I try to copy big file/files >= 10 GB, my whole system slows down. Applications take long time to open. Even I can't type smoothly, video player starts frame drop. But everything goes normal ...
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202 views

do I still have to defrag my NTFS drive

so I know that my primary ext SSD doesn't need to be defragmented, but I have a storage HDD that is formatted as NTFS. Does this drive still need to be defragged? If so, what programs would you ...
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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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1answer
643 views

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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249 views

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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1answer
77 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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1answer
104 views

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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125 views

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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/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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1answer
163 views

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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140 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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219 views

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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76 views

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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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 ...