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

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abnormal behavior of the kernel jbd2 process

I want to understand the mechanism of the journal of the ext4 file system on partitions with no free space. When a process (apache-tomcat, in my case) keeps making small additions to debug log files, ...
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3answers
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Moving 2TB (10 mil files + dirs), what's my bottleneck?

Background I ran out of space on /home/data and need to transfer /home/data/repo to /home/data2. /home/data/repo contains 1M dirs, each of which contain 11 dirs and 10 files. It totals 2TB. ...
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Use `extundelete` to Restore Single File

There is a file which I didn't delete but it went missing (see http://unix.stackexchange.com/questions/249894/files-just-go-missing-on-ext4-partition-within-truecrypt-volume). I don't know the full ...
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1answer
27 views

Manualy Clean Second Partition In Android Link2SD

I use Link2SD in my Android Phone to link some of my apps into external second partition. My external total size is 32GB and I partition it into 2 partition. First Partition is using FAT32, and the ...
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4answers
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Will transfering a file between two different file systems incur generation loss?

I want to transfer few hundred GBs of .mkv files from my Linux ext4 file system to a NTFS formatted external hard drive and since I'm a multimedia major, I can't really afford to have any quality loss ...
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How far in the past extundelete can go?

Yesterday I've accidentally deleted files from ext4 partition. During this time some downloading was running. If the content cannot be recovered I would be glad just for file names which were deleted. ...
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26 views

What data on a filesystem are really affected by powerloss?

Let my filesystem be ext4 mounted with data=journal. I don't fully understand what happens during power loss with filesystem in this case. So I have the following questions: Under which ...
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3answers
102 views

Is file creation date visible and NTFS ADS metadata preserved on an EXT4 partition accessed via SMB?

I want to build a small backup server for my essential data. I'm interested in not losing any of the features that Windows/NTFS offers, like: File Creation Date ADS metadata(comments, tags, etc) ...
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62 views

How to intentionally corrupt an ext4 filesystem?

I want to intentionally corrupt a file on an ext4 filesystem for testing. Is there a way to corrupt it by, say, leaving a file open and then rebooting?
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615 views

Is it ok to limit writes on SSD/EXT4 by setting commit parameter in fstab?

I have installed an SSD on my / (Linux scv 3.8.0-34-generic #49~precise1-Ubuntu SMP Wed Nov 13 18:05:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux). If I leave the default settings in /etc/fstab I can ...
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24 views

best way to copy content of NTFS partition to ext4 partition

I have a 263 GiB NTFS partition (with no free space) and want to copy all its files to a ext4 partition, that can't be larger than 294 GiB. I also need to copy NTFS Junctions as some kind of link. ...
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30 views

ext4 for data partition in Windows

I have moved my Windows user profile to a separate partition in order to share it with my linux install. I have originally tried to make a NTFS formatted data partition, but this creates some issues ...
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2answers
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Creating ext4 partition from console

I have a volume /dev/sda1 (1.2 TB) containing an NTFS partition using 0.6 TB space. I want to make an ext4 partition in the remaining 0.6 TB space. I have not tried anything yet because I don't want ...
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1answer
26 views

Sanity check ext partition size?

I ran resize2fs on a ext4 linux partition and I want to create a partition after it. However I want to sanity check that the size I put into fdisk afterwards was correct. What's the best way to ...
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1answer
604 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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64 views

“Bad magic number in super-block” with external HDD ext4 partition

I have a self-powered external HDD plugged through USB to my laptop. I deleted the single partition it had, intending to create a new encrypted partition. But I started getting an error once I ...
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1answer
38 views

Harddisks aren't recognized in new system (ubuntu 14)

I used to have a small home server with two attached USB disks, both formatted as ext4. Now I bought some new hardware, took the disks out of their USB case and installed them in the new server. In ...
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1answer
25 views

Best method to copy big partition contents with many hard links

We had a LVM of almost 16TB with ReiserFS. We now want to add more disks, but we cannot continue using ReiserFS, as it has a maximum capacity of 16TB. This volume is being used to make incremental ...
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1answer
259 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 ...
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2answers
7k views

Multiple partitions for an external USB hard drive used by Linux and Windows

I want to split a large external USB hard drive into at least 2 partitions. I've heard that multiple partitions on a USB drive involves problems not associated with partitioning a regular IDE/SATA ...
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0answers
30 views

Sharing Folders over Network via EXT4 Dual Boot

This may be a complicated question, so I apologize in advance: Two computers on a home network: Tesla (dual boot linux Mint & Windows 10), Spitfire (Windows 10). Both have Kodi (XBMC). I want to ...
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32 views

Unable to get ext2fsd to start automatically

I dual-boot between Ubuntu and Windows 8.1, and I am currently using ext2fsd to access files on my Linux drive and my shared file drive when I am booted up on Windows. However, I cannot get ext2fsd ...
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2answers
492 views

Want to create an ext4 partition from windows 10

I want to create ext4 partition in my internal hard disk from windows 10. I have seen many questions but all of them mention to partition with external hard disk.I wanted partition in internal ...
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2answers
3k views

mkfs.ext4 errors

I've just installed Kali Linux and am working with an img file I created from dd (/dev/zero). When I go to do mkfs.ext4 on it, I get mkfs.ext4: Device size reported to be zero. Invalid partition ...
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28 views

Sync Microsoft OneDrive with a folder on EXT4 partition in dual boot scenario

I use Ubuntu and Windows 10 in dual boot scenario. As a student I received plenty of storage on Microsoft OneDrive and I would like to upload and sync my files. I primarily use Ubuntu and prefer to ...
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1answer
23 views

How to mount an ext4 filesystem with specific permissions?

I want to mount /home such that any user can read and write to his/her own directory but only a certain user has execute permission. We have a queue system (torque) and I want users not to be able to ...
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2answers
4k 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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1answer
191 views

Recovering data from two partitions, one NTFS, the other ext4

I have an external HD, and it had three partitions on it. One was a 4GB ext4 filesystem, and two others, 120GB NTFS and 120GB ext4. I created an image on the 4GB using the Linux utility dd on Fedora ...
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76 views

sfdisk geometry warning / how to repair

I have problem with superblock in an ext4 disk : usr@rpb ~ $ sudo fsck -v /dev/sda fsck from util-linux 2.20.1 e2fsck 1.42.5 (29-Jul-2012) ext2fs_open2: Numéro magique invalide dans le super-bloc ...
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2answers
3k views

Corrupted linux partition: EXT4-fs error loading journal

I have a Linux partition (Ubuntu 12.10 upgraded to 13.4) on a machine that originally came with Windows 7. Windows 7 was working unusually slow (still is, and was still running slow after ...
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99 views

Torrents downloaded with Deluge have started getting errors

Basically, while downloading (or more often after it's fully downloaded) deluge starts reporting an an error with the downloaded data. Status: file too short: reading p: 6690 b: 0 s: 262144 (read: ...
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81 views

partition being mounted as noexec, not fstab, what else can it be?

I have one partition being mounted as noexec. It shows on the mount output, but there is nothing on fstab to do that. Where is the noexec coming from? my fstab: ...
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111 views

Proper rsync flags for backuping from ext4 to ZFS

I have a home server running Ubuntu 14.04.3 LTS with an ext4 file system, to which I regularly backup data from various devices. Now I have set-up an external USB HDD with ZFS file system and would ...
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99 views

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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89 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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28 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
44 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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108 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
78 views

ext4 superblock checksum?

I'm reading the ext4 superblock, but its s_checksum (offset 0x3FC) is always zero. Also the s_checksum_type (offset 0x175) field is zero as well, however according to ...
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3answers
4k views

Is there any way to restore EXT4 partition

Is there any way to restore ext4 partition after formatting the entire hard disk then making two partitions of NTFS
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2answers
881 views

Recover Hard Drive Accidentally reformatted from NTFS to Ext4

So me and my friend were installing Arch Linux on my external hard drive. My external hard drive had no data on it, ready to roll. My friend had partitioned my external hard drive (I am positive that ...
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90 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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195 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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0answers
60 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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47 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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1answer
79 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
69 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 ...
134
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How to read ext4 partitions on Windows?

Is there a way to read ext4 partitions from Windows? If so, what can I do?
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143 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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1answer
243 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 ...