Questions tagged [ext4]

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

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How much free space do I really have on my drive (ext4 and ntfs)?

I keep backups at two, 1.5 GB external hard drives which were both, up until recently, formatted to ntfs. The two hold identical copies of my files and folders. Recently I decided to change to ext4, ...
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No space left on device - though inodes and space OK

I'm running a Ubuntu Dual Boot (16.04 alongside Windows 10), following this protocol : https://itsfoss.com/install-ubuntu-1404-dual-boot-mode-windows-8-81-uefi/ The initial partitioning is not ...
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Read only file-system and repeated fsck across 120 machines

A little background: I work for a security company that has decided to use Linux due to its stability and customization. These machines are NVRs that my company builds from consumer components. Being ...
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ext4 - Laptop can't detect sandisk USB

I have recently installed Ubuntu 20.04 onto a USB and noticed I am unable to see it on the "Boot from USB" options. I believe this is due to installing it with the ext4 filesystem. My laptop Aspire 3 ...
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Why am I experiencing hard drive issues in 20.04?

I have four internal drives in my PC, Ubuntu 20.04. The first two are SSD drives, one for system and one for /home. Both of these are working fine. The third drive is a Seagate Barracuda 7200.10 ...
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Question about LVM and ext4 - anything similar to unRAID?

I currently have 1 HDD in my media server running 18.04.04, but would like to add an SSD to put my OS and anything else that is not media. I read that unRAID creates one large volume with parity ...
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1answer
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Ubuntu Server VM (Hyper-V): formatting of sda2 partition (mkfs.ext4 -G 4096 /dev/sda2) before install

I'm venturing into the fascinating world of Ubuntu and would like to install Ubuntu Server 20.04 LTS as a virtual machine in Hyper-V. Microsoft recommends that, when creating the file system on which ...
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1answer
32 views

How do I format just part of an external HDD?

I have an external HDD with one NTFS partition. I need to shrink that partition and add one which is formatted as ext4 for use with Dropbox. The format utility built into Ubuntu seems like it can ...
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EXT4 external HDD “converted” to FAT32 by printer

A funny thing happened, I tried to scan-to-usb with a printer (Brother brand) and since I could not find a USB key around, I plugged my external drive to the printer. It seems like it was a really ...
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gparted: cannot resize ext4 partition [duplicate]

I'm trying to use GParted to resize an ext4 partition on /dev/sda2, and I've been watching a youtube tutorial for that. But my /dev/sda2 cannot be resized. I've tried to change the number but it kept ...
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Don't see the option to select ext4 partition in Instalation screen

This is what my Gparted shows. It shows there is a space of ~97GB unallocated. I formatted this unallocated space as 'ext4' and named it as Ubuntu and here is the screenshot: In the installer tool, ...
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ubi-partman crashed with exit code 141 after formatting partition

I kept getting the error that ubi-partman crashed with exit code 141 while installing kubuntu from live usb. I eventually figured out that if I formatted my unallocated partition to ext4 in the live ...
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EXT4-fs error on Ubuntu 18.04

I know this question seems similar to the question in this link EXT4-fs error after Ubuntu 17.04 upgrade, however, mine is different in the case that I am not using a Samsung NVMe SSD, and therefore ...
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Filesystem type change from ext4 to msdos of usb

How to change file system type of usb drive from ext4 to msdos? I have a 16 GB usb drive with existing file system as ext4. Although total space available is 14.5 Gib but when i see properties it only ...
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Is metadata (dates) for hardlinked files shared or unique? Inodes and linked files!

I always assumed that the dates in each inode were maintained separately even with hardlinks. However if I change (touch/slap) the date of a hardlink file all other hardlinks to the same file show ...
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fsck -fy doesn't fix filesystem errors

When I run fsck.ext4 -fy /dev/sda2 I get lot of errors like that: '..' in /Martin/Videa (58329818) is <The NULL inode> (0), should be /Martin (26476545). No other type of error appears, not ...
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vfat works, ext4 fails on external drive

I have a 1Tb external hdd, connected via USB2 to a laptop. I bought it second-hand, and started doing lots of checks to check for problems. I've removed all partitions, and created an ext4 partition....
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151 views

File-system in read-only mode, restart, fsck repeat

My system works for a while and then eventually falls into "read-only filesystem". The only way to fix it is to restart the computer and hope that it allows me to fsck without getting into some kind ...
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1answer
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Problem with live iso run as installed

There was an SSD drive with Xubuntu distro installed. If booted, I can see it has one ext4 partition. It worked fine but was planned to be moved to other HDD and to another machine. I run live iso ...
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Ubuntu Virtual Server - mount read only for file recovery

I will recover a file with extundelete. The system is Ubuntu on a Linux Virtual Server. First, I want to mount drive as read only: mount -o remount,ro -t ext4 /dev/ploop34760p1 / Get: mount: / is ...
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Slow disk speed with rsync, but not in benchmark or with other disks

I have some problems with my self builded multimediabox. I have 4HDDs in it to store music, movies and backups from computers from the network. I got all backups on one buffer disk (Seagate 8TB ...
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Are ext2/3/4 USB Drives a critical threat to a Linux System?

I found this discussion here where those people seemed to decide weather ext filesystems should support the masquerading of the uid/gid similar to how a vfat/ntfs filesystems work when they are ...
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line of red zeros in file /var/log/syslog [duplicate]

Im currently fighting a nasty SSD bug Ubuntu freezes and shows errors, a user advised me to grab hold of the /var/log/syslog file to look out for any culprit files. Now I actually succeeded in ...
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495 views

How to enable full permissions on internal secondary HDD?

I have a secondary internal HDD formatted to ext4. How can I enable full permissions so that I, other users, and the Samba network can read, write, and execute from the hard drive? Using Ubuntu 19.04. ...
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How to access data after mistakenly partition changed from NTFS to Ext4?

Recently, I was trying to install Ubuntu on my Laptop.Laptop Specifications are as follow: Dell Inspiron 15 3000 HardDisk: 1Tb RAM 4GB During the ubuntu installation process, there was a step when we ...
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257 views

Ubuntu freezes and shows errors

My ubuntu freezes and then shows a black screen with looping error texts: systemd-journald: failed to write entry, ignoring: read-only file system ext4-fs error device nvme0n1p2 ext4_find_entry:1454:...
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How to use clonezilla to clone disk with SELF TEST failed

In my ubuntu 16.04 system, my / partition had 11 bad sectors. I ran disk smart data and self check. It said Disk is OK, 11 bad sectors To fix the bad sectors I ran I ran es2fsck. I connected the ...
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176 views

What Causes a File System to become Broken?

Recently one of my drives refused to mount, showing the error message below: Now luckily I was able to fix this thanks to another question on Ask Ubuntu that you can find here: "Structure needs ...
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27 views

Retaining Permissions for External ext4 Drive While Reinstalling OS

I've had weird permissions issues getting data from HFS+ drives before, so I wanted to ask and be sure. I boot my machine off an SSD, and have an HDD for extra data. Both are formatted in ext4. The ...
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Zero byte files after power-cycling 18.04 LTS

I tried to reboot an 18.04 LTS machine but it didn't respond so after waiting some minutes I power-cycled the machine. The machine started fine but I have found some of the recently edited files are ...
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557 views

Fix Inode checksum does not match inode while checking journal

I have the following problem while trying to access and resize a partition on my external hdd which contains Kubuntu 18.04 Lts. This problem occured after I accidentally turned my computer off ...
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Is there any way to back up the critical (non-data) bits of a 120TB ext4 drive to assist in future recovery?

I have a large ext4 disc of 15qty x 10TB hdds in an Areca 1880ix-24 RAID6 array. I know RAID does not equal backup, but the contents of this 120TB+ drive are static media files, which, if necessary, ...
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Where inodes are stored in Unix-like system? [closed]

In Unix-like OS, where the inodes info are stored for the exact path of the file. Else from where df command are getting inode info as output where that file is located.
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425 views

Ext4 external HDD seems to be 10x faster than usual, can anyone explain this

i have bought a 1 TB Seagate Usb 3.0 External Harddrive (mechanical) a while ago. I formatted this drive on ext4 because i only was intend to use this drive on linux systems. Now yesterday for example,...
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What exactly is an ext4 signature and why am I removing it?

I was following the steps from an Ask Ubuntu answer (Increase partition size on which Ubuntu is installed?) to enlarge an Ubuntu VM I have and I'm wondering what is actually being removed here: ...
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Is there a way to backup files access and modified time before run e4defrag?

I have a folder with thousands of files sorted by modified date so I can resume from where I left. Recently, that HDD became full past the 90% mark, and filesystem access become so slow that system ...
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Does copying files from EXT4 filesystem to NTFS lose permissions?

I recently attempted to back up my /home/user directory while removing ecryptfs from my system. I didn't have enough space on my Ubuntu EXT4 SSD so, not thinking, I used sudo cp -rp /home/user /media/...
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137 views

X11 Server Won't Start - Write-Protected Filesystem

I recently installed Ubuntu Mate 19.04 on my MacBook Pro (x86_64 arch). After my system went into hibernation, the root filesystem (ext4 mounted on /) became corrupted. Initially, startup would drop ...
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Accidentally made an ext4 file system on my encrypted Windows 10 OS partition

I have two drives on my Windows 10 PC that are both encrypted using Bitlocker. I read somewhere that the only way to make sure the drives are actually encrypted is to boot a live OS and see if you can ...
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251 views

File system keeps going into read-only

I keep getting back to this same issue that occurs on a VM. Proxmox Virtual Environment 5.4-3 Running a VM of Ubuntu 19.04 Every few days the file system goes read-only with errors like: systemd-...
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Files missing on new 5TB hard drive after formatting as ext4 with parted and mkfs

After connecting a new external 5TB hard drive and formatting it as ext4 with parted and mkfs with the procedure below, I then mounted the drive, copied files onto it, unmounted the drive and ...
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What is the difference between “drop_caches” and “blockdev --flushbufs”?

As the title says, I am confused about "echo # > /proc/sys/vm/drop_caches" and blockdev --flushbufs. http://pages.cs.wisc.edu/~remzi/OSTEP/file-implementation.pdf According to OSSTEP, If the ...
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Unable to create large ext4 filesystem on Ubuntu 16.04/18.04 , > 500 TB

Ubuntu-16.04/18.04, I have 2 LSI raid controllers have 30 disks of 10TB size with raid 5 group, here raid5 2 groups , created software raid0, Now I am unable to format the filesystem, xfs is ...
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Why is the output of this find -newermt command apparently not in order?

When I run touch a.txt && sleep 0.1 && \ touch b.txt && sleep 0.1 && \ touch c.txt && sleep 0.1 && \ touch d.txt && sleep 0.1 && \ ...
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620 views

How to format a filesystem hdd(not partition) from ext4 to ntfs

I have ubuntu 18.04 in my laptop. As it was my 1st laptop I bought it without OS in order to install only ubuntu. But now I want to put windows 10 on it. And I have this specific problem. 1st of all I ...
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1answer
681 views

Moving root from LVM to standard ext4 partition

I'm on a server with Ubuntu 18.04LTS with single disk in LVM partition. Boot partition is ext2 , root partition is ext4 in volume group beta-root (as show below) Filesystem Size Used ...
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Why does Gparted leave a spare used space after formating for all File Systems(ntfs,fat32,ex4)?

I have maybe a theoretical question about file systems or how gParted works. After when I deleted some patritions and then format into some file systems(ntfs, fat32, ex4). I noticed that some spaces ...
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173 views

Would it be worth switching to XFS from EXT on AWS EC2 t2.micro that is running MongoDB

Currently I am running Ubuntu 18.04 on an AWS EC2 t2.micro server. On the server I am using EXT4 for the filesystem but the MongoDB doc recommends to use XFS. Though while looking around, I’ve seen ...
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Recovering a deleted directory on linux

Good day! I seek help to deal with a problem. I recovered a directory I deleted from the home directory using TestDisk, but the directory was restored as a file. As I understand it, this is a ...
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Can't boot 19.04 after installing 2nd ext4 drive

I have a 19.04 machine. I tried adding a second hard drive that is ext4. When the machine boots it gets to a blink cursor on black screen and no further. The drive was previously the system disk for ...

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