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

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GParted merge unallocated space to ext4 partition

Here I want to merge unallocated space to ext4 partition. But during running in Ubuntu it is not allowed. Am I right? It has key picture. I must do that Ubuntu DVD booting from it and selecting try ...
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Partition Scheme Questions in Dual Boot Ubuntu/Windows installation

I just got a new laptop with Windows 8 and I am ready to install Ubuntu. I see the hard drive already has quite a few partitions, most of which seem related to Windows recovery. See capture: I am ...
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2k views

Value too large for defined data type

I need to burn a ISO (3.3GB in size) using Brasero using my Ubuntu machine, however when I try to do it which the ISO is saved in my Portable USB Drive with NTFS file system, Ubuntu 64-bit says: ...
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391 views

HDD data recovery from a formatted ext4 into fat32

I'm new to ubuntu but it didn't took me long to realize that it's way better than privative options. I've got it installed on a desktop PC and I also wanted to install it in a laptop which is not mine ...
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1answer
34 views

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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65 views

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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2answers
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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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1answer
343 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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1answer
358 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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1answer
1k 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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1answer
3k 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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0answers
530 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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1answer
277 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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0answers
235 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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1answer
2k 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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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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1answer
470 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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1answer
765 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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1answer
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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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2answers
23k 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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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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1answer
531 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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1answer
273 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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918 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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1answer
58 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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1answer
514 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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74 views

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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1answer
436 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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1answer
217 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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1answer
695 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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1answer
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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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2answers
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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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1answer
643 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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1answer
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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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1answer
405 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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1answer
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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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1answer
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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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2answers
448 views

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 ...
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How to format an external drive to ext4 in Ubuntu 13.04 [duplicate]

In Ubuntu 13.04 the Disk Utility has been renamed to Disks and has a completely new interface. Using this new version of Disks I want to format my external hard drive to ext4, but the answers to this ...
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2answers
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Shrinking down ext4 partition not working, Oracle VM (W8 host / Ubuntu 13.04 guest)

I've been trying to follow a myriad of directions all to no avail. I have a 49.4gb drive that is only using 12.1gb of space. I would like to reduce this drive to 20gb in order for it to be used on a ...
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1answer
533 views

e4defrag - what does output mean?

e4defrag shows many lines like (filename) 100% [ OK ] or (filename) 0% [ NG ], and at finish shows success/failures. Does NG mean it was not moved, OK means it was defragmented? What are the ...
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2answers
3k views

How can I change permissions on external drives right after formatting with GParted? [duplicate]

Using GParted, I have formatted an external HDD to ext4. As it turns out the default is that I have no write access. How can I change permissions on external drives?
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1answer
803 views

Mount error on new, empty External HDD - ext4

Apologies if this seems like a very similar question to others already on the site. I have searched for a few hours now for solutions, but nothing seems to be quite the same. I recently (2 days ago) ...
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1answer
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Is IT possible to make a ext4 external HD completely open?

I bought a new external HD in order to use it like a usb key to exchange files between different computers, and I formatted it using ext4 The problem is that everytime I upload some files I have to ...