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

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Trouble installing Ubuntu 14.10

When I tried to installing Ubuntu 14.10 from usb drive, it get struck at some point where it says "creating ext4 file system in /dev/sda7." It is not moving after that.
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gdisk before umount -> file system corrupted

I think I did something stupid, but I don't know how to fix it... Please help: I connected a NTFS format 2TB HDD to my ubuntu, and would like to format it to ext4 I mounted it, and copied the files ...
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20 views

Can't resize existing partition with gparted

I'm trying to resize my ext4 partition where my ubuntu (elementary os) is installed on. I started a ubuntu live cd and opened gparted, see screenshot There is no way to allocate the free space for ...
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34 views

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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35 views

Unable to mount usb thumb drive due to write protection

I have a thumb drive called EndroCraft-Lin, that all of a sudden turned read only, then became unable to be mounted. It's a PNY 8GB usb stick, that's formatted to an ext4 filesystem. Here's the error: ...
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9 views

Find duplicity files after using PhotoRec

I've partly formatted a disc where my duplicity files was stored. I have used PhotoRec to recover the files but now they're all unsorted and without the correct filename. I have the files separated by ...
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1answer
59 views

Format external hard drive to ext4 in command line [duplicate]

How do you format an external hard drive to ext4 via the command line in ubuntu?
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28 views

How do I create an EXT4 file system with block size 1024 and no reserved blocks from the command line?

How do I create an EXT4 file system with block size 1024 and no reserved blocks?
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1answer
91 views

Accidentally partitioned media drive as ext3 during install (was ext4), how can I recover?

I recently did a fresh install of ubuntu on a system with an old ubuntu install. I have a separate hard-drive which used to have a single ext4 partition, but during the install I accidentally selected ...
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58 views

Grub rescue after corrupted hard-drive ('read-only filesystem")

I run xubuntu 12.04 alongside a NTFS storage partition and a windows 8 partition. I moved my MySQL data directory off the xubuntu (ext4) partition, onto the NTFS partition, and did an import of a ...
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24 views

New hard drive accessible to everyone

OS: Ubuntu 14.04 desktop The only way I've found out how to gain access to a second hard drive through nautilus is to re-install Ubuntu while the hard drive is in the computer. Then, when I go to ...
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1answer
94 views

How to migrate from ext4 to zfs root filesystem with separate ext4 boot partition?

I'm trying to change my root partition from ext4 to zfs (simple partition, without ZFS volume management functions) by moving all files in a live system (Ubtunu 14.04) from the ext4 partition to an ...
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2answers
155 views

Accidentally formatted ext4 partition

I have just formatted an ext4 partition to fat32 using gparted. In which directions should I tread in my attempt to recover?
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2answers
82 views

improve performance - NTFS to ext4

My laptop is 7 year old HP compaq with ubuntu 12.04. It was dual booting with windows partition. I was not using windows for the last 1 year and formatted and the windows drive and removed it. ...
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38 views

I don't understand the behavior of e2fsck

I've got a USB drive that's 1TB in size and has a bunch of media files on it. It originally had an NTFS partition, but I'm moving to Ubuntu Server 14 so I wanted to convert it to an ext4 drive. I use ...
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1answer
89 views

Recover deleted Windows Partitions after formatting it as ext4 for Ubuntu installation [closed]

I just did a mistake by reformatting the whole Hard-Drive as Ext4 when trying to install Ubuntu on the PC along with my Windows 8. However, in the Ubuntu installation process, I reformatted the whole ...
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3answers
74 views

Formatting and Partitioning SSD Help?

So I just installed Ubuntu 14.04 LTS on my netbook and was going through the things to do to optimize my SSD (https://sites.google.com/site/easylinuxtipsproject/ssd) Steps 5 and 6 tell me to partition ...
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1answer
14 views

Retrieve data from a FreeSpace volume [previously ext4 volume]

Morning, Afternoon, Evening, any thing you wish. I'm using an HP-ProBook 4540S 750 Gb HDD 4 Gb of memory Intel Core i3-3110M CPU 2.40GHz x 4 I'm a software developper,so I use to install 2 Ubuntu ...
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1answer
35 views

Copying files to external HD formatted to ext4

I have bought an external HD, transcend 2TB 2.5 and formatted it from FAT32 to ext4 since I work most of the time with ubuntu. Now when I want to copy files from my computer to the device I get the ...
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1answer
31 views

How to roll back failed gparted ext4 partition growth

I had a 12TB ext4 partition which I wanted to extend to 18TB. I've added the new disks to the RAID and after doing that I wanted to re-size the partition to occupy this new space. I started the growth ...
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183 views

orphaned inodes on root file system (ext4); persistent problem

On my trusty systems (VMs under vmWare, desktops, and laptops), we have the following issue. The root file system seems to have inodes that are never marked as "free". After a month of a working ...
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79 views

EXT4 - jbd2/dm-1-8 - lazy initialization

I am running an operation that requires a lot of disk IO. It was going extremely quickly on my 500GB SSD until jbd2/dm-1-8 appeared in my iotop and is now permanently at 95-99%. From reading online, ...
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Is ext4 position independent and movable?

Does the data in an ext4 filesystem refer to absolute positions on the disk, or is it all relative to the start of the specific partition? I want to know this because I want to move an ext4 ...
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1answer
32 views

is source code for bash sufficient, when I want source code of ext4?

when I want to know the source code of ext4-filesystem (mkfs.ext4) - is it then sufficient to download the source code for bash ? - or do I need else source-codes after I did : sudo apt-get ...
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151 views

Is there anything that ext4. btrfs, or F2FS can do for a usb3.0 thumb drive that fat does not do? [closed]

I don't particularly care about cross platform. I have a thumb drive, and what to know if there is anything to gain from formatting it to ext4, btrfs, or f2fs. Thanks
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Why do ext2 and successors not need defragmentation?

The ext2/ext3/ext4 filesystem family does not need defragmentation. What underlying design help this filesystem in not getting fragmented?
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1answer
146 views

What is the best freeware app for Windows to mount EXT4 partitions (from a GPT 4TB Disk) as RW, safely without corrupting the EXT4 partition? [duplicate]

My Computer is set up as Dualboot Windows and Ubuntu. I have 1 OS drive, and 1 hard drive with a /backup partition (which has all my family photos and data) and it is ext4. Also note... it is EXT4, ...
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219 views

Synology file recovery using extundelete

It's never easy... build a Ubuntu machine for the expressed purpose of recovering deleted files or folders from a Synology NAS using extundelete. I took one of the RAID1 drives out of the Synology ...
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216 views

Xubuntu 14.04 Automount ext4 USB Stick as root

I recently formatted my new Sandisk USB Stick with linux from the default FAT32 to ext4. Unfortunatelly, when Thunar Automounts the stick, it is mounted as root and not as the current user, so if I ...
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1answer
150 views

fstrim does not work for ext4 as root

I have a SanDisk SSD P4 32GB and I use ext4. Ubuntu 14.04. I read that I should execute the trim command from time to time, however, this command doesn't work on my machine: # LANGUAGE=en_US:en ...
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1answer
74 views

How can I allow anyone to read/write files on a USB stick?

I've got a USB stick which is only used on Ubuntu machines, so is formatted ext4. The users on my machines have various user IDs, which means that a file created by a user on one won't necessarily be ...
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101 views

ext4 data recovery from gparted error

There is a number of other questions on this topic, however majority concerns formatted partitions or drive failure. In my case: During resizing and moving 2.7TB partition in Gparted, I encountered ...
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2answers
156 views

why is ext3 being used as disk format for most of linux and ubuntu and not other file systems [closed]

Can anyone explain why is ext4, ext3 or ext2 disk formats that have been used in Ubuntu as default and not others. Are there any advantages or disadvantages over other? If so, what?
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ext4 File System got damaged due to improper write

This is what happened, I inserted my (important) external HDD into a RedHat 6 machine, did my task's, unmounted the drive via Nautilus, and physically detached the drive from the machine (and now I ...
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1answer
468 views

Why is btrfs slower than ext4, and why would I want to use it in an ubuntu install? [closed]

At this time (August 2014); having been following the benchmarks for btrfs on Phoronix,(http://www.phoronix.com/scan.php?page=home) and have been seeing on the aggregate; slower performance than ext4; ...
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72 views

Suspending with root on USB

I have a laptop running Ubuntu 14.04 from a root file system on USB storage. This is not working well, because after wake up from suspend, ext4 will frequently try to write to the root file system ...
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32 views

How to extend EXT Partition of Ubuntu

I've Dual booted Ubuntu in PC by shrinking the C: drive actual size of c: drive ntfs is 100 GB and Ext partition is 15 Gb now I'm thinking to extend the size of EXT where Ubuntu is installed without ...
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196 views

Ext4 going wild

All of my main hard drive Barracuda 7200.12 SATA 6Gb/s 250GB ST3250312AS ( 2 years old ) going wild. It has started from 28 June 2014. Partitions sda1(root), sda5(home), sda7(var) caught this from ...
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How to modify the starting boundary of an ext4 partition?

There are 4 partitions on the disk. parted /dev/sda --script -- print ... 1 1049KB 50.0GB ... ext4 2 50GB 82GB ... linux-swap 3 82GB 100GB ... ext4 4 100GB 1000GB ... ext4 My goal is to ...
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231 views

slow hard disk Ubunto 14.04 ext4 on thinkpad dual boot

Ext4 - is it slower? Have a Thinkpad with 8GB drive , 4 processors. Intel® Core™ i3-3110M CPU @ 2.40GHz × 4 . Ubuntu 14.04 LTS with updates applied. File reading is very slow. IDE STS hangs when a ...
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2k views

Can't automatically mount ext4 partitions under Ubuntu 14.04 (but can mount NTFS ones)

So I just got alongside my Windows 8.1 a cool Ubuntu 14.04 and quite happy with it (my default OS now). I just have a problem: the fact that I can't mount ext4 partitions at boot is quite annoying. I ...
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228 views

Bcache hangs on Ubuntu 14.04

I successfully setup my system to use bache in /home partition (200GB SSD partition as cache for 500 GB HDD partition). However, I keep receiving these messages: INFO: task bcache_writebac:222 ...
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1answer
251 views

How to remove has_journal feature on primary disk

I'm running a Ubuntu 14.04 LTS on a VMware virtual machine and I'd like to disable journaling feature on the primary disk. I did find this useful post but I can't use it because it says The ...
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40 views

Is my harddrive broken?

I've got a new 4TB drive. My old (2TB) drive was NTFS formatted. I formatted my new drive with a single 4TB partition to ext4. I've moved content of my old drive to the new drive to format my old ...
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2answers
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shrink ext4 partition on raid 10

My question is similar to Move ext4 partition, but the challenge I couldn't figure out is how to shrink a partition from the start. So suppose originally the partition (with raid) is like this. ...
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185 views

bcache corruption after reboot

bcache seems to work fine, but after rebooting, the ext4 filesystem stored in /dev/bcache0 frequently, but not always, becomes corrupted - seemingly, it only damages metadata for recently modified ...
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1answer
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When is disk fragmentation an issue and how does one fix it?

My ext4 drive recently filled up to 95 percent capacity before I cleared out space on my disk. While transferring files from my computer to an external hard drive, I noticed a lot of my oldest media ...
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Ext4 switching to read only mode

I have very frustrating problem. My server randomly switches / mount to read only without any pattern. Only message that I've found in logs is: htree_dirblock_to_tree:920: inode #14286877: block ...
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87 views

Unable to access ext4 partition, but can access Fat32 [duplicate]

I recently installed ubuntu on a new hard disk with several ext4 partitions and 1 fat32 partition for installing windows in the future. I am able to view all partitions in File Manager. The ...
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Block size of 4096 Byte min. file size is 1 MB

If I create a new text file of size 1 KB, it takes 1 MB on my disk, although block size is 4096 Byte, how is this possible and how can I change this? System: Ubuntu Server Kernel: 3.5.0-39-generic ...