Debian :: How To Enable Data=writeback In Ext4
Dec 19, 2010
What I've done so far:
1. Edit ext4 entry in /etc/fstab /dev/sda2 ext4noatime,barrier=0,data=writeback,nobh,commit=90,errors=remount-ro01
2. Add this line in /etc/default/grub GRUB_CMDLINE_LINUX="rootflags=data=writeback"
3. Run update-grub
4. Reboot to recovery mode and run: tune2fs -o journal_data_writeback /dev/sda2(did not work) Reboot to a LiveCD and run: tune2fs -o journal_data_writeback /dev/sda2(did not work)
I have kernel 2.6.32-5-686
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Dec 8, 2010
I unknowingly formatted my whole 160GB hard disk to ext4 file system from Fat while installing Ubuntu. Now my hard disk has only one ext4 partition. recover my old data.
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Aug 31, 2010
I have a drive with ext3 that was my old /home drive.When I moved to 9.04 I went with ext4 and just linked to my old home drive.My old ext3 drive is becoming unstable so I want to back it up.I have a 500gb ata drive (unfortunately not a sata drive) thatto wipe and put 10.04 on. I want to move my data from this backup driveIm going to back up to, to the new 10.04 until I get another hd as abackup drive.My question is, I know there is some issue between ext3 and 4 and I dontwant to get into a bind. What would be the best format for moving
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Jan 1, 2011
I have a system running OpenSUSE 11.3 using the bare server configuration.I had a partition for my /srv directory. All was fine until earlier today. I shutdown my system (to remove an old floppy drive from it). When I rebooted, /srv is emtpy (no files nor directories). This is somewhat vexing, as I had several sites running from there, as well as a fair amount of data.The appropriate partition (/dev/sda3) appears using fdisk. However, there is no mention of it in /var/log/messages.Does anyone know how to recover an Ext4 partition?
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Aug 5, 2011
On my drive I had 2 partitions for an Ubuntu 9.04 (swap, /) and one partition for Windows. I figured out that I should upgrade my Ubuntu, so I deleted the "/" partition and in its place created 2 new partitions (/, /home) .
After installing the latest Ubuntu 11.04, I realised that although I had backuped everything I needed in a 2nd disk and I could access those folders and their data from my Ubuntu 9.04, both my Windows and the 11.04 can locate neither the folders nor the data now. I have no idea why this happened (perhaps some issue with the mounting?) I have tried the trial version of Stellar Phoenix linux data recovery tool, but it cannot locate the old partitions.
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Jan 10, 2010
I have a 300 external usb drive which I have got when using windows and so is using a fat32 filesystem. I have since moved to linux only and am mounting the drive as vfat however I think I may as well convert it to ext4 if possible for (amongst others) performance and security reasons. The problem is I don't have a separate drive which would hold the 250gb of data temporarily whilst I changed the filesystem of the drive so I am hoping there is a way to format as ext4 whilst retaining the files?I know partition magic on windows allowed you to change between filesystems whilst keeping the data but does anything similar (and free! ) exist for linux?
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Jan 31, 2011
Can any data be lost on ext4 with full journalling mode when electricity crashes? I know it's possible on filesystems like JFS and XFS because they don't journal data (only metadata). When ext4 in "journal" mode journalles both - data and metadata. Does it give 100% guarantee that no data can ever be lost in case of problems with electricity?
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Jun 4, 2010
Last night I made the mistake of formatting my media drive. Before the format, it was ext4. then I formatted it to ext4 again because I wasn't paying attention to what I was doing(this mistake only gets made once). Now im looking for away to recover any/all of my data. The drive in question is 1tb. I have not written any new files to this drive.
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May 6, 2011
I am running a dual boot system with Win7 on /dev/sda and Ubuntu 10.10 on /dev/sdb
I also have a 250 GB disk I use for storing backup data, /dev/sdc
The two logical partitions on /dev/sdc (/dev/sdc2 and /dev/sdc5) each take up 2.86 GB and I would like to free up that space if possible.
Since the filesystem on /dev/sdc doesn't have an OS on it, does it still require that those two logical partitions exist?
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Jun 12, 2010
I just installed F13 x86_64 on a system that used to be running Windows 7.
The boot drive is a SATA drive attached to the motherboard which is working fine.
However, my data drive is an NTFS partition filling a 3.6TB SATA raid.
It's GPT--Gparted sees 3 unknown partitions, and gdisk shows:
Code:
How do I mount this in Fedora 13? I had intended to shrink the NTFS partition so that I can create an ext4 partition to move the data to. Will this be possible?
I've got a LOT of valuable data on this drive, and nothing else big enough to store it.
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Jul 12, 2011
i 've been using fedora 14,15 for like few months and i still have a 4GB NTFS partition win XP pro.i have installed fedora in about like 20gb for root and home ext4.i rarely use win xp nowadays (once in a week) considering i was using windows for like years.i have a commondata partition of about 130GB NTFS.i now dont want to use the windows and i want to convert the 130GB NTFS to ext4, but i am worried that if somehow at some point i crash my partition tables and i was using ext4 i wouldn't be able to recover the data as easily as i would in a windows.i want to know whether there is a reliable ext4 data recovery tool for fedora?igoogled and i found this link .. if any of you guys have used these tools can you share the experiences ?Mondo RescueTestDisk safecopy PhotoRecddrescue
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Jan 23, 2010
I'm trying to connect to the VPN of my employer; after fix various minor issues I reach this point in which the DNS entries and the default gateway of the VPN are overwritten with the values of the eth0 device that appears by default. Therefore the vpn is not useful.
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Apr 23, 2010
I got a problem booting ubuntu 10.4 RC but i solved it by replacing root partirion uuid in grub boot menu then I disapled totally uuid passing to linux from /etc/default/grub . but something else i noticed why grub choosed insmod=ext2 why not ext4 specially I use now ext4 .I tried by editing the grub boot menu replacing "insmod=ext2" by "insmod=ext4" it booted and the three lines error during booting that i used to see them science ubuntu 9.10 totally disappeared . really I dont understand can anybody explane for me.and if what i did was right ,can anybody tell me how to make grub always and permenantly detect ext4 as ext4 not as ext2.
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May 19, 2010
I had 5.4 machine. Upgraded to 5.5 today via yum upgrade. All went fine. Rebooted. Wanted to convert root partition to ext4 (I have three partitions: /boot, / and swap). All of them on software RAID 1 (root is /dev/md2). I did the following for converting
yum install e4fsprogs
tune2fs -O extents,uninit_bg,dir_index /dev/md2
nano /etc/fstab # I indicated here that my /dev/md2 is of ext4
[code]....
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May 23, 2010
Will Debian 6 stable have ext4 filesystem?
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Feb 10, 2010
I recently installed Deluge 1.2.0 from the following PPA:[URL]I using this on two different Linux computers. One is running Linux Mint 8 and the other is running Ubuntu Netbook Remix 9.10. The first time on either computer when I enable WebUI in the Deluge GUI it works fine. However if I ever disable it in plugins section I am subsequently unable to re-enable it (doesn't appear in the side panel again). Rebooting or reinstalling Deluge seems to have no effect.Is this a bug or am I doing something wrong?
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Sep 5, 2010
The system disk on my lenny 64b system is using LVM, encryptions and XFS (/boot is ext2). I'm looking forward to turning it into old-style, ext4 unencrypted partitions (and thinking about btrfs in the future. Despite having used Debian for many years now, I haven't really ever tried a true migration and all of the guides out there are concerned with turning an unecrypted to encrypted. My basic idea was to use the installer and set up a minimal new system on a fresh disk, then migrate all of my stuff from the old system.
I have some doubts though
1- is this the easiest way to get the task done?
2- what do I have to copy from the current system /etc? and most importantly, what I should *not* copy?
3- how do I replicate the current package configuration on the new system without falling into a dependency hell?
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Dec 8, 2010
I recently downloaded and installed and updated Debian squeeze. Its a dual-boot machine and the migration process is going to take its own time. In the interim, I want to look at the ext4 partitions through windows. I know/knew about ext2ifs fs-driver.org but somehow I'm not able to view the ext4 partitions even though they show up in Control Panel as ext2ifs drives.
If you guys know of any other softwares which can do the same work or better please lemme know. I also tried something called ext2explore but that one crashes all the time around. Lastly, does somebody know which is the best way to be in the know of Squeeze development and the milestones within it.
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Oct 1, 2009
Is it possible to mount ext4 fedroa filesystem from Debian? Debian kernel 2.6.31
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May 17, 2010
I had Lenny with ext3 installed on my notebook. I've done the Upgrade from Lenny to Squeeze. Howto and should I convert ext3 to ext4?
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Aug 27, 2010
I thought I'll be smart, and installed squeeze on ext4 partitions ( boot-ext2, root-ext4, home-ext4 and swap). With my Lenny (ext3), I use partimage to backup the / partition, and rsync to backup my /home files. Now, I found out that partimage does not work with ext4. Are there other GNU packages I can use to backup my / partition?
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Feb 26, 2011
I've heard that ext4 has better performance, but that it will also eat my hard drive. Has this problem been fixed? What would be a safer bet on a squeeze box? Is there even anything to worry about?
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May 30, 2011
I'm not sure if this is a Debian question or a VirtualBox question, so I'm posing here and will likely pose it on the VBox forums as well.When I install Debian into a new VirtualBox VM, it always installs Ext3 as the file system. I've tried the Advanced installer, but there does not seem to be a way to specify Ext4 as the file system.My questions are:- Is Ext3 the default for Debian 6?- Can I specify Ext4 as the file system at install? Should I even care? I know Ext4 is faster, but would that performance boost be meaningful for a laptop/cloud user?I know I can convert from an Ext3 to Ext4, but that's clearly a lot more work than just installing it during initial setup.VirtualBox does support Ext4, as I have installed Ubuntu 11.04 with Ext4 and it boots and operates fine.
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May 21, 2010
I've Squeeze installed on ext3 (Upgrade from Lenny). Howto convert ext3 to ext4?
BTW What are advantages & disadvantages of ext4?
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Apr 30, 2010
I'm wondering if anyone knows what will be Squeeze's default filesystem. Will it be the proven ext3 or the newer (sometimes faster, sometimes slower) ext4?
I currently have ext4 and I have nothing to complain about. In fact, my overall experience has been very positive. Ext4 is definitely faster when fsck runs during boot.
What would be the cons of having ext4 as default in Squeeze?
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Aug 14, 2010
I have Debian Squeeze with linux-2.6.32-5-amd64Ok, so what I did is first changed fstab ext3 to ext4, rebooted, everything looked good. Then I enabled extents and other ext4 features on my root and home partitions using commands
tune2fs -O extents,uninit_bg,dir_index /dev/sda3
tune2fs -O extents,uninit_bg,dir_index /dev/sda4
then I ran e2fsck -fDC0 /dev/sda3
[code]....
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Jun 27, 2010
I am running the latest debian lenny OS and with kernel 2.6.26-2-686. I have a common /data partition for both Ubuntu and Debian which is ext4 file system. I am not able to mount this volume. The error message reads "unknown filesystem type ext4". How do I fix this. I searched the net and there was a link talking about this
[URL]
The shell says "tune2fs: command not found".
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Aug 23, 2010
Does latest Debian64 stable work with ext4 filesystem?can its root partition be ext4?
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Jan 8, 2011
My computer start to .It just stop for a minute before continuing the boot
EDIT: Could this be the cause?
Log of fsck -C -R -A -a
Sun Jan 9 23:45:42 2011
[code]...
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Jul 28, 2011
I have squeeze with ext3 installed. Howto convert ext3 to ext4 without lost data or damage a running system?
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