The ext4 or fourth extended filesystem is a journaling file system for linux/*nix developed as the successor to ext3.
Questions tagged [ext4]
469 questions
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ext4 says no space left on device but df reports 16MB free space
We are using ext4 filesystems to store data in only one big file.
We are having a strange issue : df reports free space (16MB), dumpe2fs reports 4096 free blocks (of 4KB, matches what df reports), but when trying to append data to our file the…

MCE35
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Recover data from overwritten EXT4 partition
This morning I accidentally re-installed Debian on top of a linux virtual machine (ESX). The original server had an EXT4 partition with some website content on it. I fully completed the installation and now have a blank Debian 8 installation on…

Alexander Fitu
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Ext4 physical volume with rescued data to LVM
I have /dev/sdc where are rescued data from VG vg_data. I need convert /dev/sdc to LVM with this data. Is it possible?
Edit1:
- I formatted /dev/VG_DATA/data from xfs to ext4
- Copied from sdc1 to LVM data (I thinked)
After I run rsync from sdc1 to…

Pavel
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View extended options that were passed into mkfs.ext4
I am working with two block devices in a situation where one works with a certain configuration and the other does not. I assume this must be related to subtle differences in the extended options that were passed into respective calls of…

Drux
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Power loss, hard drive missing on next reboot (?!)
There was a power failure earlier today, and now my system won't boot anymore. It shows the following error message and drops me to a root shell to try and recover the data for myself:
Log of fsck -C -R -A -a
Sat Jul 30 12:56:49 2016
fsck from…

user306802
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Software Raid + LVM + Virtual Machine: File Corruption after crash
At our startup, while trying to move our applications to a new server we ran into a hung up Ubuntu 16.04 at the new server, responding to pings but ssh hanging at
debug1: Entering interactive session.
and no login showing up when trying to login…

DaPsul
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Debian: USB HD Random Disconnect
I've a debian box (Sheevaplug) everything seems to be ok, however I've an external hard drive attached to the USB port and sometimes the drive seems to disconnect itself randomly... and connect, I get this under messages:
Mar 28 05:22:24 dbbox…

TCB13
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Having trouble mounting an mdadm array. Corrupted Filesytem?
I have a server that crashed and won't power on. I don't care about the server, but I'd like to recover the data attached to 2 external usb drives that were mirrored (raid 1) using mdadm. This system is about 3 years old and was running fedora and…
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Bit copied a disk image using the dd command to a new and bigger disk. How do expand whole LVM?
I just copied a 50 GB disk image using dd for bit copying to a new harddisk with 200 GB storage. On the disk is LVM including the system partition EXT4 and a swap partition (both LVs).
Well the copy is running and works great. Now I would like to…

TheMAn
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Need to recover a file using extundelete. Is there any risk about running it without unmounting, aside from that the partition might keep writing?
I need to recover a few files from a Linux machine. These files are important, but not enough to warrant dismounting the partition. Is there any risk from running on a mounted partition, except from the obvious about recovery that the free space…

Linux007
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change file system from ext3 to ext4 effict on MySQL
I have a situation where MySQL was installed in Linux with a ext3 file system. One table (InnoDB) reached the maximum size allowed for ext3 (2 TB) , insert statement gave "The table 'foo' is full". I have changed the file system from ext3 to ext4…

a hodali
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Two ext4 mounts, fully rsynced, same total file amount, but different total byte size. Why?
Problem
We have two mount points on two disks, both are the exact same type. Both disks are formatted ext4.
An rsync command with options to synchronize from source to destination is performed.
After the rsync is performed, the following data is…

Frugal Rasin
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tmpfs file system is full. Need assistance to increase this or remove unneeded software
Almost at a loss here. Been running a fast server for a couple of years with Plesk. Hosting our own website and services.
Over the last few days, I noticed a lot of problems but didn't think to check available file space. Checking this last night, I…

Mark Carson
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Are zero byte files an indication of file system corruption?
I recently noticed a strange behaviour. I could not restart a productive webserver running since more than a year because the configuration was invalid:
# /etc/init.d/apache2 restart Syntax error on line 161 of /etc/apache2/apache2.conf:
Invalid…

ooxi
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Creative way to shrink a live ext4 filesystem from cloud provider?
When buying droplets, as DigitalOcean calls their cloud VM's, they are always configured with one large ext4 partition.
I have an app that needs an LVM partition, so I need a creative way to shrink the root partition to e.g. 25%, and use the rest…

Jasmine Lognnes
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