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

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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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2answers
45 views

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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16 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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2answers
21k views

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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1answer
750 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

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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2answers
32 views

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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1answer
25 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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2answers
47 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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26 views

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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2answers
43 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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17 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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1answer
39 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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7answers
22k views

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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1answer
442 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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88 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
124 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
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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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3answers
3k views

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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2answers
73 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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1k 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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1answer
25 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
16k views

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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1answer
47 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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226 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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3answers
9k views

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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1answer
11k views

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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1answer
36 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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2answers
7k 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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1answer
132 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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42 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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38 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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4answers
2k views

NTFS -> EXT4 migration, where did 120 GB go?

wim@wim-ubuntu:~/Desktop$ mount | grep media /dev/sdc1 on /media/data type ext4 (rw,nosuid,nodev,uhelper=udisks) /dev/sdb1 on /media/wd type fuseblk ...
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4answers
5k views

rsync not working between NTFS/FAT and EXT

I have music that I play in my car, from an FAT32 USB stick. The folder which I use to put songs on is stored on my EXT4 hard drive. I add/remove/retag songs regularly and occassionally want to ...
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2answers
79 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
160 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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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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1answer
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How to expand the ext4 primary partition size in a VMware Player virtual disk?

I have a VMware Player virtual machine setup, running Ubuntu 10.04 as the a guest OS. The VM was created on a 20GB virtual drive, with a single partition for working space. Finally I got to the point ...
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186 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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269 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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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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4answers
59 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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159 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
46 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 ...
69
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7answers
240k views

How can I resize an ext root partition at runtime?

How can I increase the size of the root partition of a system at runtime? I have a partition that is not allocated after the root partition (which is also ext4), how can I add that unallocated space ...
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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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1answer
94 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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408 views

Problem with booting Ubuntu 14.04 from a btrfs partition

I have installed Windows 8.1 Update 1. After that I have installed Ubuntu 14.04 on a btrfs partition. However, after the restart there was no GRUB menu to choose from and the system booted directly to ...
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153 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: ...