Root device not read-write warning

There's a new warning message (https://projects.archlinux.org/mkinitcp … a191b3233a) that goes like this:
WARNING:
The root device is not configured read-write! It may be
fscked again later!
I was told to configure grub correctly but whatever I do I always have to manually modify /boot/grub/grub.cfg
and remove " ro " even if I explicitly add " rw " in /etc/default/grub. How can I make grub-mkconfig not put " ro "
in /boot/grub/grub.cfg? Is this documented somewhere?
I considered using syslinux instead but couldn't figure out how I can install it somewhere else than MBR.
Last edited by cm (2013-07-24 14:42:52)

falconindy wrote:Perhaps you should post your /etc/default/grub ...
/etc/default/grub
GRUB_DEFAULT=0
GRUB_TIMEOUT=1
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX_DEFAULT="quiet rw"
GRUB_CMDLINE_LINUX=""
# Preload both GPT and MBR modules so that they are not missed
GRUB_PRELOAD_MODULES="part_gpt part_msdos"
# Uncomment to enable Hidden Menu, and optionally hide the timeout count
#GRUB_HIDDEN_TIMEOUT=5
#GRUB_HIDDEN_TIMEOUT_QUIET=true
# Uncomment to use basic console
GRUB_TERMINAL_INPUT=console
# Uncomment to disable graphical terminal
#GRUB_TERMINAL_OUTPUT=console
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
GRUB_GFXMODE=auto
# Uncomment to allow the kernel use the same resolution used by grub
GRUB_GFXPAYLOAD_LINUX=keep
# Uncomment if you want GRUB to pass to the Linux kernel the old parameter
# format "root=/dev/xxx" instead of "root=/dev/disk/by-uuid/xxx"
#GRUB_DISABLE_LINUX_UUID=true
# Uncomment to disable generation of recovery mode menu entries
GRUB_DISABLE_RECOVERY=true
# Uncomment and set to the desired menu colors. Used by normal and wallpaper
# modes only. Entries specified as foreground/background.
#GRUB_COLOR_NORMAL="light-blue/black"
#GRUB_COLOR_HIGHLIGHT="light-cyan/blue"
# Uncomment one of them for the gfx desired, a image background or a gfxtheme
#GRUB_BACKGROUND="/path/to/wallpaper"
#GRUB_THEME="/path/to/gfxtheme"
# Uncomment to get a beep at GRUB start
#GRUB_INIT_TUNE="480 440 1"
#GRUB_SAVEDEFAULT="true"
falconindy wrote:Yes, using the 'systemd' hook is an option. An option and not a requirement. Just fix your kernel commandline to specify 'rw' instead of 'ro' (or nothing) so that your root device is mounted rw after fsck'ing.
How do I specify 'rw' instead of 'ro' the correct way with grub?
Last edited by cm (2013-07-24 14:44:25)

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Message was edited by: hening

[Solved] - Root device not found - Unable to boot!

Before posting links to other threads or to the pacman/mkinitcpio wiki page please go through the following.
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Last edited by theta (2012-06-15 15:44:15)

ewaller wrote:
Do you know the partition that is supposed to be your root partition?
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If you do not know the partition arrangement, use that limited recover shell you mentioned to go look around and determine it.
Hmm, Thanks for this advice but I can't help saying that I'm not a noob .
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[SOLVED]kexec into arch fails : root device not found

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Last edited by Nolhian (2012-07-28 17:47:30)

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Last edited by 4s|m3tr|ko0 (2009-01-21 10:14:32)

4s|m3tr|ko0 wrote:
ballon wrote:It seems like my problems can be the same, however I haven't managed to solve it myself so if you can be more detailed that would be nice.
Of course I can, it's quite easy.
First of all, you have to boot from an Archlinux install CD, to have an usable environment. Once you have booted, I will assume a couple of things to make the examples, which are:
"/dev/sda2" is the root partition where the system is currently installed but not booting.
"/dev/sda1" is the boot partition (not needed if you don't have a separated boot partition, obviously).
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chroot /mnt/myarch/ /bin/bash
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[Solved] Can't boot, root device not found

I recently performed an update of udev and my kernel and after this I am unable to boot the normal kernel or the fallback. When I try I get this error:
ERROR: Unable to find root device '/dev/disk/by-uid/03619a2f-908f-4724-ba4b-1fb3985e382b' You are being dropped to a recovery shell Type 'exit' to try and continue booting sh: can't access tty; job control turned off
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Last edited by Surry (2012-03-20 00:06:12)

This has been solved.
For anybody's reference:
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Last edited by bwh1969 (2009-01-18 23:04:59)

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none /dev/pts devpts defaults 0 0
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# + mkdir /mnt/floppy
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Root device not read-write warning

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