Home > Cannot Change > Cannot Change Data Mode On Remount Ext4
Cannot Change Data Mode On Remount Ext4
Or perhaps manually specifying all mount options so it skips what's in fstab? Why put a warning sticker over the warning on this product? Then the fs will be auto mounted with data=journal by the kernel and won't conflict with the fstab.Disclaimer: I haven't tested this.I have just tested this, and it works. in /etc/default/grub: GRUB_CMDLINE_LINUX="rootflags=data=writeback" -> update-grub2 6. weblink
How can tilting a N64 cartridge cause such subtle glitches? All rights reserved. The nth numerator On 1941 Dec 7, could Japan have destroyed the Panama Canal instead of Pearl Harbor in a surprise attack? LinuxQuestions.org > Forums > Linux Forums > Linux - General [SOLVED] "data=writeback" in fstab mounts root partition as "read-only" User Name Remember Me? http://www.linuxquestions.org/questions/linux-general-1/data%3Dwriteback-in-fstab-mounts-root-partition-as-read-only-916031/
Data=writeback Bad Option
According to /etc/fstab, / is supposed to be mounted as discard,errors=remount-ro,noatime,data=writeback. The crux of the problem is that the file system was mounted with different options than specified by user and this option can't be changed on the fly. Do students wear muggle clothing while not in classes at Hogwarts (like they do in the films)? What is the definition of "rare language"?
Report a bug Atlassian News Main menu Skip to primary content Quick Start Downloads Buy Codecs Forum FAQs About About us Contact us Technical, help and resource documents Trademark rules Raspberry errors=panic Panic and halt the machine if an error occurs. (These mount options override the errors behavior specified in the superblock, which can be configured using tune2fs) That is (and this So we mount with rootflags and ro/rw and remount with the /etc/fstab of the real root. Ext4 Data=journal Having a problem logging in?
The kernel the executes the 'init' process and during this the fstab is read and the filesystem is remounted read-write. try chmod +r or +w or +a through z / miegielAugust 18th, 2009, 06:27 AMHave you tried mounting it twice, I maen monting it automatically as you boot and then manually Would "-s" help here? click for more info Opts: errors=remount-ro,data=journal
[ 412.235632] EXT4-fs (mmcblk0p2): Cannot change data mode on remount
[ 459.916646] EXT4-fs (mmcblk0p2): re-mounted.
If you need to reset your password, click here. Ext4 Barrier=0 Steps taken: 1. (live CD) Use cfdisk to cut up the drive 2. Moreover potentially there might be options where specifying/unspecifying them might alter the file system in some way which will make this much worse if the fs was not mounted ro initially. xyepblraOctober 21st, 2009, 04:35 PMFinally I found the thread my help request it would be proper to post to.
It will then prompt you for extra parameters and you put rw and press ENTER. https://ubuntuforums.org/archive/index.php/t-1243135.html holister View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by holister 11-28-2011, 07:01 PM #6 jthill Member Registered: Mar 2010 Distribution: Arch Data=writeback Bad Option Most notably xfs where the problem is much bigger, because they would currently silently drop the options (intentionally) they can't change on remount (vast majority of the mount options btw) leaving Tune2fs -o Journal_data_writeback even data=journal has the same error.
However -o remount,rw,data=ordered gives the same error. have a peek at these guys And one more: I saw some references that you could set the root mount mode at the grub cmdline, at least in earlier Ubuntu releases Your grub kernel line would read Finally login as root, your system will be in read/write mode. I've attached the simplest kickstart file I could come up with to reproduce the problem I'm seeing, alogn with "journalctl --system" and "dmesg" output. Ext4 Commit
C++: can I hint the optimizer by giving the range of an integer? When I created the file system I didn't use the option to journal_data, which is not "ordered" mode, per ext4 default. Anyway what is you suggestion kernel should do about this ? > > We've got a file system which is already mounted and the user space > requested remount with the check over here Not sure if the problem is already fixed, but I'm sure it's something we cannot fix by mount(8) ;-) Comment 7 Gabriel Somlo 2014-12-22 09:42:42 EST Created attachment 972056 [details] kickstart
Offline #3 2013-11-26 02:30:14 weylandthesmith Member Registered: 2013-11-22 Posts: 4 Re: "Cannot change data mode on remount" Hey WonderWoofy,Thanks for the reply (and sorry for my late involvement, we've had power Ext4 Disable Journaling The trick is to edit into the kernel, change RO to RW, Ctrl-X to reboot and then gedit fstab. Are you new to LinuxQuestions.org?
humidityFebruary 11th, 2010, 01:27 AMHi there, I found out a solution to the Read Only issue.
Anyway what is you suggestion kernel should do about this ? What helped then, was adding "nomodeset" as boot option in grub. (press "e" on the appropriate menu entry.) That made it boot for me. jthill View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by jthill 11-28-2011, 09:48 PM #7 holister LQ Newbie Registered: Oct 2010 Posts: Ext4 Performance Tuning I followed Cody Little's guide until the last step that I did was blessing my boot partition within OSX (right before configuring XORG).Afterwards, I was supposed to boot into Arch for
From tune2fs manpages: -O [features] tune2fs -O ^has_journal /dev/sdX -> Turns journalling OFF journal_data_writeback - This mount option does write to journal. "When the filesystem is mounted with journalling enabled..." (Therefore, Format For Printing -XML -Clone This Bug -Top of page First Last Prev Next This bug is not in your last search results. Just run data=writeback,commit=600 (edit: should have been more explicit - only data=journal journals your data. With all the try-this and try-that, now I can't reproduce EXT4-fs (sda3): mounted filesystem without journal in 'dmesg'.
BM jdowdellJuly 7th, 2012, 02:35 AMI had the same issue adding datamode=writeback in fstab, not realizing / is mounted earlier and the system complains that it can't change the datamode on This will override the problem you created and you will then be able to go fix it. Note You need to log in before you can comment on or make changes to this bug. Here's my old fstab:
/dev/mapper/vg1-root / ext4 defaults,errors=remount-ro 0 1
I changed it to:
/dev/mapper/vg1-root / ext4 rw,data=journal,journal_checksum 0 1
Well… upon reboot, I got
Formatting with mke2fs -O ^has_journal followed by tune2fs -O ^has_journal accomplishes removing the journalling option and then 'data=writeback' conflicts in fstab??? You can list the options on the file system with "tune2sf -l /dev/sda1". It booted right up with my new fstab options.