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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Mystery stack traces in /var/log/messages
I am seeing the following messages in my server's /var/log/messages. They look like stack traces and are not preceded by any narrative (e.g. "such-and-such has gone wrong").
I am almost certain they are related to I/O problems I am experiencing, but…

NPE
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Can't fsck From Live CD
I'm trying to run fsck from a Linux Mint Julia live CD, but something seems to be going wrong. When I run:
sudo fsck /dev/sda5
I get the response
fsck from util-linux-ng 2.17.2
e2fsck 1.41.12 (17-May-2010)
fsck.ext4: Device or resource busy while…

Josh
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Can't Mount Remote Share From RHEL 6
I'm trying to upgrade some Linux systems to RHEL 6, but I cannot mount the home directories. I'm using EXT4 for the RHEL 6 system and EXT3 on the RHEL 5 server, which I'm mounting the directory from. I can't just use the mount command; I have to…

Tom B
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Can't configure quota on CentOS 5.5. Strange behaviour of quotacheck and other quota commands
I have Centos 5.5 linux with quota enabled in fstab
[root@drone3 ~]# mount | grep usrquota
/dev/sda4 on /storage type ext4 (rw,noatime,nodiratime,usrquota)
When I tray to activate quota on the /storage I hit the following messages…

ntk
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mdadm lvm and ext4 slowness - How can I speed it up?
I can't figure out why I'm getting such terrible times out of my mdadm and in particular the lvm partitions in it.
I made the raid:
mdadm --create --verbose /dev/md0 --level=5 --chunk=1024 --raid-devices=4 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
#…

beatbreaker
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Mac Fonts stored on Ext (Linux File System)
I currently have a PowerPC g5 running Mac OSx. I've network shared one of the external hard drives (which is mac formatted, hfs+ journalled i believe).
I'm now upgrading this to an ubuntu computer, and I want to ditch that external hard drive and…

Jason
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Ext4 corrupted after RAID failure and fsck taking too long to run
I am completely lost :(
I got software RAID10 with 4 drives, one of them failed yesterday, right before or after the failure system crashed and restarted. It started data rebalancing and completed it successfully, however it still can't mount raid10…

Alex N
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Ubuntu 10.04 with ext4 gets repeated IO errors
we installed a new DELL server with the (not supported) Ubuntu 10.04 LTS. We configured a hardware RAID (I think RAID 1) with the DELL tools before installing Ubuntu.
The server is not under load at all, a small Postgres Server and some Samba shares…

Tarnschaf
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Rclone to a SFTP endpoint in a local network with a bunch of disks - suggested disks setup?
I have a need to copy a complex dataset (around 4 PB total, hundreds of millions of files) via Rclone copy, for some customers (each of them own around 100TB out of the 6PB) - to a bunch of disks via potentially the sftp protocol. Electing not to go…

JaneD
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RHEL + what could be the reason that FSTYPE not defined from lablk , in spite filesystem was created on disk in the past
I want to share the following very strange behavior , that for me it's not make sense but its a a fact on our production RHEL 7.2 server
disks are VMDK
from df -h we can see the following:
sdb /DB_STORAGE_1
and its also defined in…

King David
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"rsync: [generator] mknod … failed: File name too long (36)" though file & path name lengths are way shorter than 255 & 4096
On a QNAP NAS I'm trying to copy a huge backup directory from internal to an USB disk. The backup set was created using back-in-time, therefore it uses hard-links for deduplication and encfs generated file & directory names.
Running rsync -aH…

bentolor
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CIFS corrupts ext4 FS inside an image mounted on loop
I have a CIFS volume which contains an image file formatted with ext4 and mounted on loop. Sometimes the ext4 FS corrupt itself and the following lines shows in the logs:
Jan 30 04:00:02 server1 kernel: [817452.247111] CIFS: Attempting to mount…

as3ii
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rm -rf on some direcories never complete
I have several directories in an ext4 filesystem that I can't delete. When I run rm -rf on the directories ps aux | grep rm shows a status of D for the process. I have tried allowing it to run for several days.
The same directories have the same…

Roger Creasy
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mdadm RAID5 mismatch, which file(s) on ext4 filesystem are affected?
After a scrub of my 4-disk RAID5 mdadm array I got these log entries:
Dec 03 07:20:53 srv10 kernel: md1: mismatch sector in range 204340608-204340616
Dec 03 07:20:53 srv10 kernel: md1: mismatch sector in range 204340616-204340624
Dec 03 07:20:53…

MrCalvin
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Linux: 1 TB HDD showing 7 TB partition!
I replaced a 1 TB HDD (which holds a single EXT4 partition with lots of hardlinks to backup files/directories also inside this partition. It has also a bunch of regular files/directories) with a 2 TB HDD and now I'm trying to copy the former's data…

Antonio López
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