fsck fails during boot with 2.6.9-34.0.1.EL kernel because root filesystem is already rw mounted

[Nitin B]

Boot your system in single user mode using new kernel and check /etc/fstab.
If it doesn't have default options edit it and add "defaults" . Oce this is
done reboot.



On 25/06/06, Floriola <floriola2000 at yahoo.com> wrote:
>
> Hi,
>
> I have a RHES4 server running kernel version 2.6.9-34.EL. During this
> night, I have updated to
> latest kernel-2.6.9-34.0.1.EL. The problem is that with the new kernel, my
> linux is not booting
> anymore. During the boot, I have the following error:
>
> Checking root filesystem
> [/sbin/fsck.ext3 (1) -- /] fsck.ext3 -a /dev/VolGroup00/LogVol01
> /dev/VolGroup00/LogVol01 is mounted. e2fsck: Cannot continue, aborting.
>
>
> [FAILED]
>
> *** An error occurred during the file system check.
> *** Dropping you to a shell; the system will reboot
> *** when you leave the shell.
> *** Warning -- SELinux is active
> *** Disabling security enforcement for system recovery.
> *** Run 'setenforce 1' to reenable.
> Give root password for maintenance
> (or type Control-D to continue):
>
> Luckily, I still have the old kernel installed, so I booted with the old
> one, without any
> problems.
>
> I dig a bit more, and I found the following:
>
> In the old 2.6.9-34.EL kernel that I am able to boot with, the init script
> in the initrd contains
> the following mount command:
>
> mount -o defaults --ro -t ext2 /dev/root /sysroot
>
> while with the new kernel 2.6.9-34.0.1.EL that I have just installed, the
> init file in the initrd
> contanin the following command:
>
> mount -o rw --ro -t ext2 /dev/root /sysroot
>
> So this is why with the new kernel, my root filesystem si already mounted
> read-write during the
> boot process, before the fsck.
>
> However, this looks quite weird. First, I cannot find anywhere what this
> --ro means (there are no
> info about this option in the man page). Most probably, it means that the
> filesystem should be
> mount read-only, but then why in the new kernel the mount command contains
> also "-o rw" option?
>
> And why in the previous kernel, the root filesystem was mounted with the
> "-o defaults" option, and
> the new one is mounted with the "-o rw" option?
>
> Any ideeas?
>
> Thank you in advance,
>
> Floriola
>
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