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

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Choosing partitioning scheme, effects and pros?

pipe-raiding and cat-loving people! I need to reinstall a Ubuntu computer at work, since I am kind of fresh taking responsibility for my usual partitioning mistakes I thought I need to turn to the ...
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2answers
27 views

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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15 views

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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2answers
37 views

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

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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1answer
24 views

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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0answers
39 views

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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1answer
80 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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1answer
21 views

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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2answers
62 views

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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1answer
23 views

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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1answer
400 views

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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1answer
36 views

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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124 views

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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1answer
32 views

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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1answer
83 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 ...
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2answers
33 views

What does the grey slice in disk usage represent?

When I right click on Properties for my ext4 partition I get the following pie chart: The meaning of the blue and white slices are fairly obvious, since they are in the legend to the right, but ...
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0answers
31 views

problem re-installing ubuntu 12.04 LTS amd64 on DELL inspiron 5454

I've just bought a second hand DELL. I always use Ubuntu, and DELL is usually very simple and straightforward, I usually never have any problems. However this DELL is having problem after problem. ...
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2answers
62 views

Converting my hard drive to NTFS [closed]

I have a new install of Mint and I would like to go back to back to Windows. I'm aware I need to convert it to NTFS and have tried to make gparted work but it not would allow me to change/shrink my ...
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1answer
118 views

fstrim does not work (Ubuntu 14.04, ext4, Intel SSD 520)

I've been googling around for hours without having found an answer. I've found some hints, but they don't correlate with each other. $ sudo hdparm -I /dev/sda | grep TRIM * Data Set ...
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0answers
41 views

Lost all files in root partition without formatting partition and delete operation, TestDIsk is not help?

I've Windows 8.1 and Ubuntu 14.04 installed in my PC. Two system were in different disk. All disks are in GPT mode. I used one software, "Paragon ExtFS for Windows", which can mount EXT4-partition in ...
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161 views

Input/output error on mounted usb disk

I have an external usb disk mounted to my machine, and everything works fine for hours or days, but eventually I cannot access the disk anymore. When I try to list the mounted directory, I get ls: ...
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4answers
57 views

Cannot uninstall Ubuntu… boot problems

I've been trying to remove Ubuntu from a laptop (separate issue), but I've not been able... any suggestions will be appreciated. Here some details: Dell Inspiron laptop, 32 bit, no UEFI secure boot ...
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0answers
69 views

Why is my read speed limited to 40 MB/s (< 25 %) reading from ext4 when compress-force is zlib and there's no CPU usage?

I'm moving data from an ext4 filesystem on a HDD connected with USB 3.0 which usually reads and writes with 170 MB/s to a btrfs subvolume on a SSD which usually reads and writes with 360 MB/s with ...
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1answer
133 views

ECRYPTFS_FNEK_ENCRYPTED files and folders

I had a problem using my old hard drive, so I'm willing to recover the files in it, but it is encrypted, and all the files and folders are named ENCRYPTFS_FNEK_ENCRYPTED and some gibbberish... The ...
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1answer
41 views

Copy a file from one ext4 partition to other

I have two ext4 partition and I want to copy some files from one partition to other in GUI not using terminal, but it does not allow me to do so. It simply a root permission problem. I just want to ...
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40 views

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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1answer
69 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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790 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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140 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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1answer
1k 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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1answer
65 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
119 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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126 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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1answer
66 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
322 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
872 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
526 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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110 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
192 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
99 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
18 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
45 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
55 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 ...
2
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0answers
281 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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120 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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29 views

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
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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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1answer
244 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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52 views

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
380 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, ...