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

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CentOS 7: Partition resizing issue where now there is a lost+found folder full of numbered folders and the data is gone

Set up Running a home server with a 2TB HDD. Running VMWare ESXi 5.5 that has 2 guest OS; CentOS 7 and Windows Server 2012 R2. There are 3 virtual disks (VMDK) thickly provisioned: 20GB CentOS 7 ...
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44 views

Copying .exe files from ext4 to ntfs

maybe a silly question but.. why cant i copy an .exe file format from linux (ubuntu 14.04) to windows 8.1 without corrupts when i try to execute it? I can copy some others file formats like images ...
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22 views

Partition recovery

During a fresh installation, I accidentally formatted a disk containing datas. I tried using testdisk to recover the erased partition, but , it only detects the new one. With the deeper search mode, ...
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1answer
33 views

Infinitely deep folder without symlinks in ext4

It seems like I can find an infinite number of /pl/locale subfolders in this ext4 partition, yet none of them are symlinks. Where is the loop? $ ls -ld ...
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39 views

GParted shows false partition information after resize2fs of ext4 partition

I expanded my mdadm RAID 5 from 5 to 6 4TB disks and grew the raid. That all worked well. After I tried to expand the ext4 filesystem in GParted, which failed because of the 16TB limit. Afther the ...
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89 views

How do I use an Ext4 partition from Windows with correct file permissions for Linux?

I use Windows 7 and ext2fsd to access a data partition which uses ext4 as mentioned here, here and here. I can read and write from Windows. When I boot into Linux, it is able to read the files but ...
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1answer
42 views

about CentOS 7 apps & Driver [closed]

im using pc for several years but never tried Linux so im quite noob in this field. im using Autodesk maya, Nuke & will learn houdini very soon. i found that linux works faster for this apps so ...
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41 views

Filesystem fails when trying to boot Arch from USB pendrive

Lately I was trying to make bootable pendrive with Linux Arch. Following "Begginers guide" from wiki.archlinux.org, I made it, using syslinux as my bootloader, however, it doesn't work properly. ...
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1answer
34 views

Moving a partition without gparted [duplicate]

I need to move (shift) an ext4 partition on my disk in a headless Linux machine, like this: Before: [######### Partition #########][- Free space -] After: [- Free space -][######### Partition ...
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38 views

Recover specific files from a damaged hard drive

I'm trying to recover some 3-5GB of NEF files which were not yet backed up at the time of the crash. This is a 418GB ext4 partition and when mounted with -o ro,noload I can list the directory where ...
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73 views

Resize encrypted lvm volume and reallocate the space to windows partition

Here's a diagram of my solid state drive's partition setup. sda sda1 - boot (ext4) sda2 - LUKS Encrypted Partition LVM Volume Group Swap Logical Volume (ext4) Root Logical Volume (ext4) Home ...
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134 views

Unable to mount corrupted (?) ext4 filesystem on usb hard drive (Ubuntu 14.04)

I have a 1 TB external USB hard drive from which I deleted the original NTFS partition and created an ext4 partition through gparted. I then started copying a 500 GB file onto the new partition, but ...
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87 views

Ubuntu 14.04 Desktop as local server - ext4-fs error

I have set an Ubuntu 14.04 as a local server. Also I have two identical hdds on RAID1, on md0. I have tested raid configuration and works ok. I installed virtualbox from the official website and keep ...
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0answers
39 views

Is copying files between two different file systems slower than between the same file systems?

I was wondering if copying files between different file systems (for example from ext4 to ntfs) is slower than copying to the same file system (from ext4 to ext 4). I also would like to know how does ...
2
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1answer
47 views

Understanding metadata usage behavior in a newly converted btrfs filesystem

I have a 5 TB hard drive with 3.3 TiB (as reported by du) of media files in 119k files and directories; the average file size was about 28 MiB. I converted the ext4 partition into btrfs with ...
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1answer
31 views

Is Filesystem relevant in SFTP?

I have a home server with an NTFS disk attached, and I use FileZilla to access the data on that disk. I have both Linux and Windows clients, and I was wondering if the data would still be accessible ...
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1answer
73 views

recovering scrambled ext4 partitions

My year old 3TB Seagate drive stopped working. The drive had 3 ext4 1TB partitions which hold almost 2 years of accumulated data. I was using it in a ubuntu server when the mounted partitions stopped ...
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67 views

How to defragment or minimize a “directory file” on ext4?

I have quite an old home directory on HDD. There were lots of files created and removed and now the size of /home/username is 995328 bytes. Please note, I mean the size of the "directory file" (every ...
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1answer
97 views

Ext4 USB stick gets corrupted again and again

I installed Debian Wheezy (No GUI/Desktop) on a 4GB USB stick (because the harddrive of the machine was defective, currently the slot is empty), but shortly after, I got an “Input/Output error” when ...
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34 views

What is the `fsck.ext4 -i` file format?

I have a usb hard-drive that I just reformated as ext4, but which will fail in r/w mounting after a few seconds, remounting in read only. dmseg and /var/log/syslog help me as they provide information ...
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1answer
11 views

Not able to drag an application into new sda1 HD?

My primary HD (sdb) is a SDD (Solid State Drive). I installed and formatted a new 300 GB drive (sda) to ext4. I am not able to drag an application.run file into the new sda1. Why? Because it need a ...
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0answers
110 views

SSD seems to be read-only, nothing can be written to it (linux ext4 filesystem)

After two week of normal use my new SSD began to work strange. Now it seems that no file is written to it. An example: root@hooker3:~# mount |grep ssdhome /dev/sda3 on /ssdhome type ext4 ...
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17 views

Why is the Write Cache not set by default to enabled in Lubuntu 14.04?

Is there a reason why they have not enabled it yet? I thought ext4 was stable now. I am on a SSD if that matters.
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1answer
29 views

Partition for a non partitioned ext4

I have a large almost full disk that was written with a ext4 FS but without being first partitioned. I need to use it with a Windows 7 machine (via ext2fs), but I also have a Linux machine available. ...
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1answer
80 views

Which filesystem should be used for a dual-boot machine's storage? [duplicate]

I'm planning on setting a dual-boot machine with Windows (8.1) and Debian sitting on different partitions of an SSD. The problem here is my 1.5TB storage drive. I'm planning to use Windows and Debian ...
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2answers
98 views

fedora 21 lets a user overwrite a file he does not have access to

I reproduced this problem on two fedora 21 machines. I would like that sqlite3 does not write the ~/.sqlite_history file. I couldn't find an option but said, no matter, I'll make it that it can't ...
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1answer
777 views

mounted filesystem without journal. Opts: (null) while mounting ext4 fs

I am using Beaglebone black with NFS, I have formatted internal eMMC with ext4 filesystem, when i mount the file system using following command message popups telling filesystem is mounted without ...
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1answer
83 views

Does btrfs-convert preserve the disk's UUID?

I'm thinking of converting my / from ext4 to btrfs. Will the UUID change?
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22 views

How can I get Samba to close files immediately?

I've been experiencing a baffling disappearing file issue on my NAS since I first bought it, and only today after extensive testing do I think I have a handle on what exactly is occurring. I fear ...
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1answer
40 views

How to check that all files in a file system are can be read without errors?

I'm using an external hard drive with an ext4 file system to make backups. The backup software I use (faubackup) copies the file hierarchy 1:1 into a timestamp-named folder on the hard drive, and ...
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52 views

How can I identify and read only free-space junk data from EXT4 partition?

I have cloned an EXT4 partition via raw dd command from a Galaxy Nexus phone. How can I identify and read only free-space junk data from the EXT4 partition? I need to recover some WAVE samples(I'm ...
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2answers
2k views

How to format to NTFS my EXT4 partition on Windows 8?

I'd like to format one of my partitions to NTFS which is EXT4 at the moment and an ubuntu is installed on, that I don't need anymore. I can't see the partition in My Computer and I've never tried ...
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2answers
65 views

Accidentally formatted ext4 partition

I have just formatted an ext4 partition to fat32 using gparted. I stupidly closed gparted before I realized that I might have been able to use the undo function. I am currently attempting file ...
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1answer
297 views

Unable to Create Files In Directory

There are lot of these kinds of questions on superuser, so I'll try and keep this quick by telling you what it's not: There is no application involved here. Just a user and a filesystem. I can login ...
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1answer
79 views

How to safely shred unlinked files on a Unix-based file system?

Scenario: After working with a confidential file (e.g. PDF a bank statement), you typed: rm my-confidential-file (or the famous Shift-Delete action in a GUI-based file browser such as nautilus) ...
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1answer
751 views

ext4 fs not recommended for SSD's? Alternative FS [closed]

I read ext4 journalling fs is not good enough for SSD's by some anonymous posts. while phornoix review shows JFS, not a known FS for average Desktop user is considered best for SSD. I believe JFS is ...
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1answer
1k views

Why I cannot format a microSD to ext4?

I have a Toshiba Class 10 64GB microSD that I want to use in a tablet (Cyanogenmod 11) by formatting it ext4. So I did the usual thing (under Fedora 20): created a single Linux partition with sfdisk, ...
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1answer
228 views

Recover LVM with software raid

I have a Synology NAS using SHR mode, which is basically LVM and Raid 5. Somehow my LVM volume became corrupted and won't mount anymore. This volume houses over 20TB of data, and most of it is NOT ...
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38 views

How many actual files were you able to store in a CentOS folder? [closed]

I found many questions about the total files limitations of the CentOS file-system, but I was curios in actual real-world situation, how many files people were able to store in one single CentOS ...
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4answers
1k views

How to copy files from one computer to another without losing any metadata?

Similar to but more demanding than this question : How to copy files while not modifying the file creation times at all? I want to copy files between computers without the "Modified" and "Created" ...
3
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1answer
363 views

How to stop jbd2 to release a device

In an AWS EC2 instance, we have multiple EBS volumes. When I try to detach any of them, the umount command works, but the device can't be detached. # grep -c xvdj /proc/mounts 0 However, lsof ...
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1answer
246 views

How to shrink an ext4 partition from Windows?

My system has three primary partitions: two NTFS (one "system-reserved") for Windows 7 and one ext4 for Linux. How can I shrink the ext4 partition from Windows? I've tried the built-in Disk ...
2
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0answers
1k views

Forcing ext4lazyinit to finish its thing?

Is there any way to 'force' ext4lazyinit to finish the thing it does with maximum priority? Something like "I don't care about my system's ressources, just do your job as fast as you can"? I should ...
0
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1answer
61 views

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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1answer
515 views

Restoring data from lost NTFS partition?

I had 3 NTFS partitions (C,D,E) on my old laptop running Vista. I wanted to install Ubuntu on the system partition C, i.e. over-write Vista, but keep D,E which were storage partitions. Stupid moron ...
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1answer
245 views

Someone please explain how I'm writing to EXT4 from Windows 8.1

I'm dual booting Debian amd-64 Wheezy 7.5 and Windows 8.1 I have 6 drives and I am 100% positive that four of the drives are formatted Ext4 (Formatted in Linux) How on earth is it that when I'm in ...
2
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0answers
166 views

Ext4 allocation pattern with random writes in sparse file

If I create a large (a few GB) sparse file in ext4, and then write randomly throughout the length until all 4k blocks have been "touched", in the absence of other heavy write load, can I expect that ...
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2answers
6k views

Convert ext4 hard drive to ntfs fromat without formatting

I have a 1TB external hard drive with about 800gb data of ext4 format. Is there a way of converting it to ntfs format without having to format hence losing my data?
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47 views

Install e2fslibs 1.41

I have to use extundelete for my debian, but it requires e2fslibs 1.41. The command apt-get install e2fslibs-dev installs 1.42 version that is not compatible with it. How to downgrade? I'm usingh ...
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1answer
140 views

I accidentally formatted the wrong volume - is it possible to restore the previous Ext4 filesystem?

I know that a similar question has already been asked. This morning I accidentally formatted the wrong volume, containing mostly video files (about 30GB each). I am currently trying to restore the ...