[partially solved] Root mounted as read-only, lots of errors

I started my laptop without the power cord, and the boot stopped at several steps. I could continue the boot with pressing the power button for a second. XFCE booted fine, but some things were broken. Then I rebooted, and I cannot boot to xfce anymore at all (with or without power cord), since the root is mounted as read-only, and other partitions are not mounted at all. I didn't change my system at all so it is difficult to fix the problem. Now when I boot I just get lots of errors due to the read-only root partition. Fstab should be okay since it worked before, and has not been modified in months.
# /etc/fstab: static file system information
# <file system> <dir> <type> <options> <dump> <pass>
none /dev/pts devpts defaults 0 0
none /dev/shm tmpfs defaults 0 0
#/dev/cdrom /media/cd auto ro,user,noauto,unhide 0 0
#/dev/dvd /media/dvd auto ro,user,noauto,unhide 0 0
#/dev/fd0 /media/fl auto user,noauto 0 0
UUID=141f10a8-d0f2-43e0-b71e-5d01f1b3b126 /boot ext2 defaults 0 0
UUID=7f0ebf97-6e66-4e39-9db8-05fabd53180b swap swap defaults 0 0
UUID=859ac481-922b-4126-a575-462b145581fd / jfs defaults 0 0
UUID=3439fb11-ee6f-443a-9635-73ee7268e31c /media/disk ext3 defaults,data=writeback 0 0
UUID=82e37328-095e-4fd8-87ca-a74c6decc746 /media/oldroot ext3 defaults,data=writeback 0 0
I found related errors in daemon.log
Jun 23 13:15:26 nawi laptop-mode: Remounting filesystems.
Jun 23 13:15:26 nawi laptop-mode: /dev/sda6 not found in PARTITIONS.
Jun 23 13:15:26 nawi laptop-mode: / not found in PARTITIONS.
Jun 23 13:15:26 nawi laptop-mode: Checking /dev/sda6 against HD because PARTITIONS contains "auto".
Jun 23 13:15:26 nawi laptop-mode: Considering /dev/sda.
Jun 23 13:15:26 nawi laptop-mode: /dev/sda6 contains /dev/sda, which is in HD, so we will remount it.
Jun 23 13:15:26 nawi laptop-mode: Original options: rw
Jun 23 13:15:26 nawi laptop-mode: Reducing file system type.
Jun 23 13:15:26 nawi laptop-mode: Executing: mount /dev/sda6 / -t jfs -o remount,rw,atime,norelatime
Jun 23 13:15:26 nawi laptop-mode: Executing: /sbin/blockdev --setfra 256 /dev/sda6
Jun 23 13:15:26 nawi laptop-mode: none not found in PARTITIONS.
Jun 23 13:15:26 nawi laptop-mode: /dev not found in PARTITIONS.
Jun 23 13:15:27 nawi laptop-mode: Checking none against HD because PARTITIONS contains "auto".
Jun 23 13:15:27 nawi laptop-mode: Considering /dev/sda.
Jun 23 13:15:27 nawi laptop-mode: none not found in PARTITIONS.
Jun 23 13:15:27 nawi laptop-mode: /proc not found in PARTITIONS.
Jun 23 13:15:27 nawi laptop-mode: Checking none against HD because PARTITIONS contains "auto".
Jun 23 13:15:27 nawi laptop-mode: Considering /dev/sda.
Jun 23 13:15:27 nawi laptop-mode: none not found in PARTITIONS.
Jun 23 13:15:27 nawi laptop-mode: /sys not found in PARTITIONS.
Jun 23 13:15:27 nawi laptop-mode: Checking none against HD because PARTITIONS contains "auto".
Jun 23 13:15:27 nawi laptop-mode: Considering /dev/sda.
Jun 23 13:15:27 nawi laptop-mode: none not found in PARTITIONS.
Jun 23 13:15:27 nawi laptop-mode: /dev/pts not found in PARTITIONS.
Jun 23 13:15:27 nawi laptop-mode: Checking none against HD because PARTITIONS contains "auto".
Jun 23 13:15:27 nawi laptop-mode: Considering /dev/sda.
Jun 23 13:15:27 nawi laptop-mode: none not found in PARTITIONS.
Jun 23 13:15:27 nawi laptop-mode: /dev/shm not found in PARTITIONS.
Jun 23 13:15:27 nawi laptop-mode: Checking none against HD because PARTITIONS contains "auto".
Last edited by nawitus (2009-06-23 20:57:47)

It seems that laptop-mode remounted the partitions as read-only, because of bug in laptop-mode(?). I disabled that daemon, and now boot works. After that I can boot normally even with laptop-mode daemon, but now I'm afraid of booting without the power cord as that can break the system..

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    Hello all,
    I'm new to Arch Linux and trying to migrate all my works to arch. Installed KDE, GNOME3, and hardware drivers successfully But I have problems with USB flash disks. When plugging a usb device, system mounts it as a readonly filesystem. so I can't change its contents. It always happens to my flash disk, but flash disk of my friend is ok!
    I tried to mount manually with super user access, but no hope. It says:
    [root@myhost soroush]# mount /dev/sdb1 /mnt/
    mount: warning: /mnt/ seems to be mounted read-only.

    roygbiv wrote:Maybe you can post your /etc/fstab?
    # /etc/fstab: static file system information
    # <file system> <dir> <type> <options> <dump> <pass>
    tmpfs /tmp tmpfs nodev,nosuid 0 0
    /dev/sda2 / ext4 defaults 0 1
    /dev/sda3 /home ext4 defaults 0 1
    /dev/sda4 swap swap defaults 0 0

  • [SOLVED] Appending Quiet forces Read-Only filesystem

    After the update to initscripts I tried to append quiet to the kernel command line of GRUB and it simply causes my system to start-up as a read-only filesystem.
    Last edited by horrormaster (2011-08-01 15:36:21)

    title  Arch Linux x64
    root   (hd0,1)
    kernel /boot/vmlinuz26 root=/dev/disk/by-label/gnu_linux ro rootflags=data=writeback,commit=90,orlov,barrier=0,async
    initrd /boot/kernel26.img
    If I add "quiet" before "rootflags" everything fails to load on boot (udev, mounting HDD rw, alsa, cupsd, etc.) and after all of those it simply states "Read-Only Filesystem". If I add "quiet" after "async" it fails to boot altogether due to an unrecognized option.
    Last edited by horrormaster (2011-08-01 02:04:07)

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