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

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Is it possible to unmount the /home partition?

I want to recover some files in my home directory using extundelete http://sourceforge.net/projects/extundelete/ This tool needs to unmount the device before start to work, but I cannot umount ...
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What algorithm is used by Disk Utility encryption?

What encryption algorithm is used by the partition encryption function of Disk Utility?
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fsck on ext4 resulted in file corruption

I had to hard reboot my machine and I had a file system corruption. I have tried to run fsck on the partition from live CD. However my partition is ext4 and I understand that fsck defaults to ext2 ...
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252 views

Where are drivers located for rEFInd?

I am planning to recompile my kernel with EFI Stub support, but currently my Ubuntu installation's partition is formatted with ext4fs. I have the rEFInd ext4fs driver (ext4_x86.efi) in the refind-bin ...
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Why aren't my drives fscking [duplicate]

I logged on to my Ubuntu server and the message of the day contained these wonderful messages: *** /dev/sda1 will be checked for errors at next reboot *** *** /dev/sda6 will be checked for errors at ...
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Install a software throe wine on ntfs partition

I have a question I want to install windows software, but I do not have enough space on ext4 partition, so if I install the software on ntfs directory will the software run as it would run on ext/home ...
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Can I disable updatedb.mlocate?

On ubuntu server here and I'm trying to unpack 300M image files from a compressed file format using Java. My unpack rate is 0.5Mbytes/sec, abysmal (34 days to unpack 1.5TB at this rate). I'm trying ...
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189 views

Changed Partition from NTFS to EXT4 and owner is set to root

I just changed the file-system of one of my partitions to be able to install games from steam on it. It is now ext4 and Owner is set to root, I can not create any folders there or do anything with it. ...
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Is it safe to defrag ext4 file system using e4defrag?

My file system partition is 90GB, and now 75% of the space is free after removing 53GB of recovered files using photorec from my home directory. I just want to know, is it safe to defrag the whole ...
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File recovery after reformattig ext3/4 partition — extract old journal/superblock?

I seem to have reformatted my /home partition (previously ext4) as ext3 during an Ubuntu installation. It took me a couple of mounts to figure that out. Which, of course, is a bad thing. I've tried ...
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My NTFS and ext4 partition mounts as read only

After upgrading some packets (that I don't know what), my ext4 partitions are mounted as read only: m@mpc ~ $ sudo mount /dev/sda5 /mnt mount: warning: /mnt seems to be mounted read-only. My NTFS ...
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ext4 to btrfs conversion: how long can it take? space requirements?

I started btrfs-convert for my ext4 partitioned hdd. I did a fsck first which was fine. So since it is running over 4 hours now (1.) I wonder if it will ever finish ? I read multiple articles ...
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Installing Ubuntu 12.04 LST along windows without formatting any drive

I am facing a problem while installing ubuntu along with win8. The specs about my pc are following: 500 GB HDD (c:100, d:100, f:50, g:100 h:100 i:50) and every drive has important data, and are NTFS ...
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1answer
74 views

Does ubuntu one synchronize extended file attributes?

Ext3 and 4 filesystems, if mounted with that option, support extended file attributes with which you can add metadata to your files: author, ACLs, and actually whatever you want. Does Ubuntu One ...
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How could I mount an ext4 partition and have write permission?

I've set the /etc/fstab file so that I can mount an ext4 partition on startup and I did it with the following options : rw, auto, nouser, exec, sync. The problem is that I can't create or delete any ...
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426 views

NTFS vs EXT4 behavior on a HDD with a bad block

Anyone have a guess as to why a HDD, formatted to EXT3, failed showing a bad block, and when wiped and reformatted (just to test) gave errors in gparted for every file type except NTFS? The drive ...
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1answer
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Mounting NFS issues - LVM - ext4

I set my ubuntu desktop up with LVM2. I don't know if that is contributing to the issue or whether I have forgotten something. When I try to mount the external filesystem with this command: sudo ...
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1answer
538 views

ext4 filesystem wrongly detected as jmicron_raid_member

I have an installation of Ubuntu 12.04 on an SSD disk that I'm unable to boot after a kernel upgrade and a reboot. Additional things that might be a possible cause is that I did some cleanup (dpkg -r) ...
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270 views

Will converting my first partition to EXT4 make me lose boot info?

I recently switched from Windows to Lubuntu as my sole OS. My filesystem now has a NTFS partition with all my data (which I now would like to convert to EXT4), a EXT4 partition with Lubuntu on it and ...
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ext4 partition ubuntu lost after Windows 7 installation

I've got this problem: I have one hdd and use ubuntu 12.10 on this hdd with several partitions(one nfts, two ext4 and one unallocated). today after windows 7 installation, and booting with live usb, ...
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183 views

How can I install Ubuntu in such a way that files are readable by both Ubuntu and Windows?

I am installing Ubuntu alongside Windows, choosing the dual-boot option. I do not want to do a Wubi installation. I want a full fledged installation. I want to share files between Windows and Ubuntu. ...
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1answer
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How to mount root.disk from WUBI when booted from dual boot install of Ubuntu?

I'm running Ubuntu 12.04 LTFS. On the same disk, I have another Win7. On the NTFS Win7, I have buntu 11.04 running on a ext4 partition that was installed with Wubi. I'd like to be able to access my ...
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I need to convert ext2 filesystem to ext4 to prevent fsck every time I boot?

Installed Ubuntu 12.10 alongside manufacturer-installed Win 8 with no problems. Was "clever" enough to install as ext2 filesystem, which has resulted in the inconvenience of fsck making the usual ...
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1answer
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How to recover data from Ext4 partitions?

I've removed an old HDD from a computer and to install in another computer to use for data storage (personal files, specifically tv series episodes, not system files) and the file system that I've ...
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disable initramfs in order to accelerate boot process

I was wondering if it is possible to disable initramfs on an ext4 partition in order to reduce the time it takes Ubuntu (12.04) to boot. See source here! Instead, setting up the root device directly ...
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Difficulty mounting Ubuntu 12.10 (64-bit) on new HDD

To the gentle membership of the Ubuntu Linux Forum: After my laptop passed away a few weeks ago, I made up my mind to build n open source system. So I put together a computer for this purpose. I have ...
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865 views

Ubuntu12.10 “Disks” Pendrive 64GB format LUKS+ext4

I just bought Pendrive / Flshdrive 64GB and need to archive on it file bigger than 10GB so i believe FAT32 is not an good option since it can handle only 4GB file in size. Next thing is that i though ...
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Why is disk usage greater than the size of all files on it?

I have a 3TB HDD. In the properties screen of the HDD, it says that I have used 471.4GB, but when I select all the files in nautilus, it says that 321.0GB is selected. If I only have 321.0GB of ...
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194 views

duplicate truecrypt drive

How would I go about duplicating a truecrypt hard drive for redundancy purposes? I have lots of original video content, which I store on encrypted drives. And wanted to know the best way to create ...
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2answers
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Automount ext4 partition with user permission/ownership (fstab?) [duplicate]

I just installed Lubuntu 12.10 "Quantal Quetzal" on my Acer Aspire One D257, creating the partitions: $ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda5 15G 2.1G 12G 15% / ...
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/dev/sda2 contains a filesystem with error after partitioning (updated)

I just wanted to create a separate home partition on my Ubuntu 12.10 system. I booted the liveDVD, resized the sda2 partition (28gb of data resized to 30gb based on MiB [originally on a 100gb ...
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Installed ubuntu over windows vista..cant reinstall windows [closed]

I recently used the "compress hard drive" option within windows. i got the horid "boot mngr is compressed" after the restart. i tried booting my system back to windows vista but it doesnt read the cd ...
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1answer
649 views

I accidentally permanently deleted a file, how can I recover it? [duplicate]

Possible Duplicate: How to recover deleted files? It's probably best to ask for advice on a support forum. Is it possible to recover a deleted file?
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Copying to ntfs from ubuntu slower than ext4 - why?

Is copying to ext4 faster than copying to ntfs, because I was making new containers today on ext4 speed was 45Mb on ntfs same container size speed 14Mb, both containers where madden from ubuntu with ...
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171 views

Max file size can recover on ext4

Is there a limitation for recovering big files on ext4 like ntfs ( 4 giga max )
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undelete files on ext4

My mother has placed some important files on her /tmp per accident. Now, of course, they are gone. This happened yesterday (2 boots of the machine since) I want to try to undelete the files. They ...
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0answers
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Recovering deleted ext4 Ubuntu partitions using TestDisk (None partition media table type) [closed]

All screenshot images in one album: http://imgur.com/a/gqPio#0 (updated: added deep search results) Question How do I write (recover) found partitions from [None] None partition media table ...
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1answer
277 views

Trying to copy an ext4 partition that has errors on it, to a new disk

I have a linux installation in a 50GB partition, on an old 80GB sata disk that is starting to show some errors in it's SMART status, and also, it's an old slow disk. So I want to copy it to a newer ...
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Default file system on ubuntu 12.10

Why does ubuntu 12.10 default to ext2 file system? Is ext4 not stable enough?
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870 views

Is this tactic of switching from btrfs to ext4 safe?

I've been using btrfs on Ubuntu 12.10 for both / and /home for several weeks. Through out the time I've come to the conclusion that ext4 performs better on my system and I'd like to switch back ...
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1answer
5k views

File Sharing With Ext4 Partition

I tried googling this problem but I haven't received a definitive answer. This is my situation, I have a 3TB external hard drive connected to my server via esata. I plan on sharing this drive over a ...
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68 views

How to best check my hardware (mem and HD) for errors? [duplicate]

Possible Duplicate: How can I check my RAM and harddrive for errors? Lately, I have been experiencing problems using an Apple (macbook pro 3,1 2GB ram) with Natty installed. In three ...
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1answer
402 views

full internal harddrive converted to ext4 file system..what to do install windows back again ?? plz help

hi i m a complete newbie at linux...i had a windows 7 installed in my laptop nd drive partitioned..i installed it formatting the drive as it didnt detect i had windows 7 too already...neverthlss it ...
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1answer
226 views

High CPU load for 1:30 minutes when mounting ext4-raid partition

--> The problem solved itself <-- Sometime between November 2012 and January 2013 one of the Ubuntu updates made the time the mount command takes to complete go down to ~1 second again: time ...
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How to convert ext2 to ext4?

I installed Ubuntu 12.10, and I don't know why, I have an ext2 partition. How can I convert this ext2 file system to an ext4? Will I lose all my data?
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Is SSD TRIM support still automatic in 12.10?

Folks I had automatic TRIM working on my laptop running Ubuntu Precise. As in the TRIM guide I added discard to mount options in /etc/fstab, and hdparm --read-sector read 0s immediately after a rm ...
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How to create a common ext4 [ read / write ] partition with all ubuntu users?

I have a shared EXT4 drive with 777 permissions for all users to use. Problem is : When a user creates a new folder / file, it gets 644. I guess that is because of the umask for that user. Now, I ...
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1answer
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Repair ext4 filesystem on USB drive [closed]

Yet another filesystem question. I wanted to use a USB drive that I hadn't mounted for a month or so and was surprised by the fact Ubuntu was unable to mount it. I looked it up in the disk utility and ...
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1answer
585 views

Uninstalling ubuntu + partitions

I have Ubuntu 12.04 installed onto my dual-boot system; how can I uninstall it? Which partition(s) should I delete? As you can see, I have two used/Full up 'Other' partitions and one ext4 ...
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Mounting ddrescue image after recovery (in over my head)

I'm having problems mounting the recovery image. I've tried to mount the image multiple ways. quark@DS9 ~ $ sudo mount -t ext4 /media/jump1/1recover/sdb1.img /mnt mount: wrong fs type, bad option, ...