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

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Can I create another partition on a single partition system? [duplicate]

I have a system running Ubuntu 13.10 in a single partition. I need to create another ext4 partition, is it possible without reinstalling Ubuntu? Please show me the procedure, if it is possible.
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EXT4 Partition Lost?

Booted up from live media (ubuntu 12.04) with HDD (3TB, GUID, single EXT4 partition used for storing data and nothing else)connected via SATA. For some reason the file system was only allowing "read ...
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391 views

How to extend ext4 with gparted?

I am having short in disk space in my ubuntu /dev/sda6 and i have 11.08 GB of free space unallocated in the sense.I have followed different article about the repartition but they are not working here ...
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152 views

Is it safe to disable resize_inode on ext4 FS?

I have 2TB spanned LVM ext4 volume which contains large and mostly static files. With "static" I mean they usualy don't change in time. The volume is 99% full, and adding new files becomes very slow ...
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107 views

Why is there a size discrepancy between HFS+ and ext4?

I recently set up an NFS server on my Ubuntu server and I'm currently in the process of migrating my files from HFS+ HDDs to ext4. I've run into a problem however where the receiving disk (ext4 ...
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How to online resize the root partition? (ext4) [duplicate]

i've got a 1tb harddisk with 3 partitons: fat32 /boot/efi ext4 / linux-swap My ext4 partition has 700 GiB free so i would like to use some of that space (like 200 gib) for a Windows 8 partition. ...
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620 views

Formatting a USB flash drive as ext4

I'm making a custom bootable USB flash drive with a persistent partition. Formatting the partition as ext2 obviously makes the filesystem very sensitive to improper unmounting. I remember a while back ...
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1k views

Can't mount HDD /wrong fs type, bad superblock

I have browsed the many other questions related to my question, there seems to be many solutions for others, but not for me, when I try to mount my HDD using: sudo mount /dev/sdd ...
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183 views

My portable HDD cannot be mounted into filesystem — can't read superblock

I have a Seagate portable hdd 1 TB formatted fat32. Now I had no problems at the very beginning, but now I am getting the following error: Error mounting /dev/sdb1 at /media/zorobabel/EFI: ...
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127 views

Problem creating ext4 partition

I can format partition to linux-swap and ntfs, but can't for ext4. I did boot on a ubuntu usbkey in "try ubuntu" mode. /dev/sda1 was unmounted Here is gparted reports : GParted 0.11.0 ...
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How a tmp folder set on a mounted folder from another ntfs drive does can report free space from that drive to Audacity?

I have set the tmp folder for Audacity on a mounted folder from a target ntfs drive. But I've seen that Audacity does not see the free space from that ntfs drive but instead the free space from the ...
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116 views

Writes occurring to fresh ext4 partition every second endlessly. Cause and solution?

I've an external 500GB HDD connected to my Laptop which runs Ubuntu 12.04. I've formatted the external drive with one ext4 partition which spans the entire disk. My problem is that the disk makes ...
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179 views

How to expand the ext4 partition of virtualized Ubuntu running on top of CentOS/QEMU?

My company is running Xen--VMs run on top of CentOS/QEMU. Recently a customer using virtualized Ubuntu asked that his HDD space be increased. Now, with Windows, this is a joke. You type the new size ...
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944 views

Can't solve: ext4 file system creation failure Ubuntu 12.04

This seems to have been covered a lot before, but none of the solutions seem to help. It's the usual getting this error message while installing. The ext4 file system creation in partition #1 of ...
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49 views

Moving free space from C drive(NTFS) to G Drive(ext4)

I am totally new to Ubuntu. I have installed Ubuntu 13.1 with 5Gb space in Drive G but now I cleaned windows on C drive and want to move free space from C drive to G drive. Pls help me with the ...
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How do I format an usb to ext4 to use it on Ubuntu without without sudo permisions? [duplicate]

I use Ubuntu in a machine I own and in a machine I only have standard user permissions ( not admin). Is there any way to format a usb to ext4 and make it work (file ownership problems) if I cannot run ...
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248 views

How do I get the source code for just the ext4 file system on a Windows machine?

I'd like to get the source of the just the ext4 file system, but from on a Windows machine. At the moment I've navigated to http://archive.ubuntu.com/ubuntu/dists/saucy/, but everything I've found ...
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419 views

Mount point for multiple ext4 partition

I can't find any related question and answer that will satisfy me on my quest. All I see that people telling to create a ext partition with mount point '/' and a swap space. But I want to create ...
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2k 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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7k 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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How can I apply additional boot parameters? (using LiveCD) [duplicate]

I'm having the same issue as Franz here: Can not install Ubuntu (13.04 / 12.04) due to ext4 error Cubiq advises adding pci=noaer,nomsi to the "boot string" and Franz comments that this piece of ...
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Why do I keep getting an error when I try to resize ext4 under extended?

I had already assigned unallocated space to my extended partition and now i want to enlarge my ext4 partition. The problem is, it starts and when its almost finished, it gives me an error and makes me ...
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331 views

mounting external hard drive EXT4: “the unlocked device does not have a reckognizable filesystem on it”?

I'm having problems mounting ext4 partitions(inside a LUKS partition) in external drives. The drives are fine, there is no problem whatsoever with the drives and no filesystem corruption. This ...
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357 views

mkfs.ext4 parameters

I have a question about the ext4 filesystem and in specific about the tool mkfs.ext4. mkfs.ext4 -j -O extent <device> What does -j really do? In the manual it says that it creates an ext3 - ...
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191 views

snapshot of certain user home directory every 12 hours

I have a build server that builds our comnay product in a continuous build method. the build user is called build (surprise ,surprise, i know :-) ) and most of the data that it uses is simply taken ...
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514 views

Mount external ext4 with changed uid and gid

I'm trying to share a single external hard-drive between two ubuntu different machines. The problem is, my user uid and gids are different across the two machines. Is there a mount option for ext4 or ...
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203 views

Copy VirtualBox image files from Mac OSX to Ubuntu using USB

I created a VirtualBox image on Mac OSX 10.9. I need to copy the files to a USB drive, in order to distribute it to Ubuntu computers. I tried it with USB drive formatted on Mac with HFS+ filesystem. ...
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45 views

Hotkey to start sync or flushing memory

I'm asking a question in a very strange manner, i'm sorry. I know what i want, but i don't know exactly how it's called. I hear somewhere that ubuntu (or linux) has hotkeys , shortcut to start ...
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281 views

Lost extended partition after installing windows

I was using Ubuntu 13.04 and the hard disk was partitioned as follows: Primary Ext4 (250GB) Linux Extended (250GB) and Ext3 or Ext4 logical partition Linux Swap (4GB) I have installed Windows 7, ...
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Question regarding drives

I am a new Ubuntu user who has spent a lot of time on Windows. A very common practice for me on Windows was making two drives, C: and D: , storing installs/files in C:, and I used D: for backup or if ...
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78 views

How can I change partition ext4 boot options?

I want to make boot-able to my user a partition called "backup". My intention is keep here data. To be accessed with "DiskInternals Linux Reader" on windows, and from my user on linux. However I ...
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Unable to mount Secondary Harddrive

My primary hard drive is a SSD and is boot essential drive. I have a 1.5 TB hard drive (HDD) in my computer which is partitioned: 440 GB for my Ubuntu as ext4. Today when I booted up I got an error. ...
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310 views

Use IOzone to check read/write performance of ext4 and btrfs?

Can someone help me to use IOzone filesystem benchmark tool on Ubuntu to check the performance of ext4 and btrfs filesystems? I have installed Ubuntu into a VM.
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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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162 views

Formated xfs partition to ext4 by mistake, can it be recovered?

I formatted a xfs partition by mistake to ext4. Can this be undone and the data recovered? Actually, I did not chose to have the partition reformatted during installation, I just kept the default ...
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Can't recover formatted Ext4 partition file system. :( Suggestions?

I've been at this for days now, so I'm hoping you can help me! Original setup: This is a 200GB firewire drive, originally formatted via Ubuntu 11.04 Disk Manager with a Master Boot Record, and a ...
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102 views

Data recovery after formating from ntfs to ext

Ok, my 320GB internal laptop HDD was partioned as (1) 20GB partion EXT4 (2) about 290GB extended partion to two NTFS partions (3) 4GB SWAP partion Sure ubuntu is installed on the "EXT" partition ...
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Ext4 Data Recovery Help

My data is on an Ext4 disk that is very corrupt, here is the output from fsck.ext4: http://paste.debian.net/plain/47345 (There are 664 inodes containing multiply-claimed blocks.) Why has this ...
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534 views

Recovering a file after having formatted from NTFS to EXT4

I used to have windows 7 but I've recently formatted my hard drive to install kubuntu and I've just realized that I forgot to backup a hidden .dat file which defines my bitcoin wallet. Is it possible ...
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3k views

how do i format my hard drive to ntfs from ext4 [duplicate]

I have a usb with my windows ISO loaded and ready. Problem is there is no ntfs partition on my hard drive for windows to load onto. I don't want to complicate things by running 2 operating systems. ...
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942 views

Superblock set in the future, fixing system clock

I keep getting errors messages about my Superblock mount time being in the future, and insisting on doing fsck on every boot and I have to go in from the recovery options to do this every time. Here ...
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428 views

Change root file-system type (LVM)

I have an Ubuntu 13.04 server configured in this way: % df -TPh ...
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Is there a way to find the LBAs for free blocks in ext4

tune2fs can show the number of free blocks. Is there a method/tool to find the actual logical block addresses for each free block? Thanks in advance
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How to recover files from a partition that was previosuly NTFS under Wndows but after Ubuntu installation had been converted to ext4?

I had accidentally installed Ubuntu 13.04 on Windows 8 while trying to Dual Boot. I had a single partition(973GB) which had windows with NTFS filesystem. But by the accidental install of ubuntu the ...
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363 views

How to mount EXT4 drives from another system

I had a testbed 13.04 server which had a boot volume partitioned into three, root, swap and Workspace as well as two other drives running in raid 1. The Workspace and raid volumes were setup using LVM ...
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Trying to mount backup of /dev/sda as ext4 for recovery, fdisk reports invalid partition table

I used dd if=/dev/sda of=~/backup.img where /dev/sda was an ext4 filesystem. I want to perform recovery on it which means I need to mount it as ext4 filesystem using extundelete application. Can ...
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Do I use ext4 for all partitions (such as / and /boot)? What are the other formats used for?

I'm installing ubuntu onto a new laptop with 24gb SSD and a 500gb HDD. I wanted to put / and swap onto the SSD and /home onto the HDD. Is there anything I shouldn't use ext4 for? I do not ever intend ...
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799 views

Can not install Ubuntu (13.04 / 12.04) due to ext4 error

I was trying to install Ubuntu 12.04 LTS Desktop 64bit Edition on my new PC. (1TB SATA HDD) I set my mainboard to use BIOS to boot up. At first I tried installing next to Windows 7, got errors. Now I ...
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2k views

EXT4 Filesystem seems to have disappeared

I previously had an LVM consisting of a few different drives, including two 4TB Seagate USB's. I migrated my data off the drives. Copy -> Shrink -> Copy -> Shrink Once the drive was removed I ...
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sha256sum/md5sum gives different results for big files (Ext4/Full disk Encryption)

Yesterday I reinstalled Ubuntu 13.04 64-bit on my computer (4GB RAM), and for the first time I decided to use Full Disk Encryption (all default settings). Today while running backups my computer ...