Kernel Panic upon installation & reboot [SOLVED]

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

My disk partitions are /dev/sda1 Linux Ext2 /boot

/dev/sda2 Swap Linux

/dev/sda3 REsierFS /root

Upon Grub Install & Reboot I get this message

VFS = Cannot Open root device"sda3" or unknown -block(0,0)

Please append a correct "root= " boot option.

Kernel Panic - not synching: VFS: Unable to mount root fs on unknown -block(0,0)

When I do fdisk /dev/hdb I get a HD for
712MB besides this is /dev/sda (17GB)

My grub.conf is

default 0
timeout =10 seconds

title =Gentoo Linux 2.6.11-r3
root(hd0,0)
kernel /kernel-2.6.11-gentoo-r3 root=/dev/sda3

Whats the problem.

Thanks,
Naveen

RayDude

Varg_ · Posted: Thu Jun 09, 2005 6:22 am Post subject:

Make sure you have both ext2 and reiserfs drivers compiled into your kernel as well
_________________
Tautological Defenestration

projectle · Tux's lil' helper Joined: 30 Jan 2005 Posts: 90

You used Genkernel to make your kernel, yet did not use the --udev flag.

Boot using the LiveCD and mount your enviroment
chroot /mnt/gentoo
env-update
source /etc/profile
cd /usr/src/linux
genkernel --udev all
exit
umount /mnt/gentoo/boot /mnt/gentoo
reboot

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

This time I re did everything with genkernel --udev all

I get this message upon reboot

>>Mounting filesystem
mount: Mount devfs on /dev failed: No such device
Error: Opening file : ".devfsd" No such file or directory

>>Determining Root device
>>Block device /dev/sda3 is not a valid root device
>> The root block device is unspecified or not detected. Please specify a devive to boot, or "Sheel" for a Shell.

Upon in Shell in dev/ I dont find sda sda1, sda2, sda3, but I find that when I mount /mnt/gentoo/dev.

/sda1 -s ext2
/sda2 Linux swap
/sda3 Resierfs

in /etc/fstab

I have put this for root
/dev/sda3 / reiserfs noatime 0 1

is this correct?

I guess .devfsd is missing, How to create this?

Thanks,

Naveen

nixnut · Posted: Thu Jun 09, 2005 6:20 pm Post subject:

Looks like you enabled devfs in your kernel. Devfs is deprecated, you should use udev instead.
The output of grep DEVFS /usr/src/linux/.config should be:
# CONFIG_DEVFS_FS is not set
Check that. If it's something else, reconfigure and rebuild your kernel.

And make sure that in /etc/conf.d.rc you don't have a line RC_DEVICES="devfs", it should be set to auto or udev.
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Please add [solved] to the initial post's subject line if you feel your problem is resolved. Help answer the unanswered

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NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

When I compiled using genkernel --udev all , it stated that it was using old config file. I guess the compiler did not find the correct config file. I will give this a try and let you know.

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

There is not file called conf.d.rc in /etc but a directory by name conf.d/rc, In rc file there is a setting DEVFS_STARTUP ="Yes" which I set it to "no",

I created a file conf.d.rc in /etc and put RC_DEVICES="auto",

I still get the error message, I get I compiled with the old config file, it just adopted the old config file when I used genkernel --udev all

I will put RC_DEVICES ="udev" in conf.d/rc and try again.

nixnut · Posted: Thu Jun 09, 2005 6:53 pm Post subject:

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

I did change it, now should I re-compile it again. When I do genkernel --uudev all, it says cannot find config file using old config.gz or something of that sort.This might be what set the devfs option on. The original config file in /usr/src/linux has

# CONFIG_DEVFS_FS is not set

ie it is not set.

What should I do to make complier get the right config file, & not use the old config file?

Say if this works right, should I then compile a WM like GNOME?
OR it is already compiled?

Thanks,

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

Upon when I last compiled genkernel, I did DISTDIR=/mnt/cdrom emerge coldplug.

But it wanted to access the internet even when it was directed to the cdrom I guess the file was not on cdrom. same case with hotplug.

So, I copied the coldplug & hotplug from the liveCD and then did a
rc-update add coldplug boot
rc-update add hotplug default.

Is this wrong, is this what is causing the problem?

Thanks,
Naveen

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

Forgot to mention another thing.

When genkernel -udev all is issued,

it says seeking config file from /etc/kernels/kernel-linux-2.6.11.2-rbacking up old config to config.bak.

I did a grep DEVFS on kernel-linux-2.6.11.2-r3 file

I get CONFIG_DEV_FS: is not Set

Same case with .config in /usr/src/linux.

I have one SCSI HD (sda) and at it send is a small plugin (might be HDB (712MB)) This HD is strange it has more pins than a regular HD I guess becoz it SCSI.

I just hope I get this working soon, get a WM and on the internet soon

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

I did another recompile with RC_DEVICES="udev" in /etc/conf.d/rc

The same problem continues?

>>Mounting filesystem
mount: Mount devfs on /dev failed: No such device
Error: Opening file : ".devfsd" No such file or directory

>>Determining Root device
>>Block device /dev/sda3 is not a valid root device
>> The root block device is unspecified or not detected. Please specify a devive to boot, or "Shell" for a Shell.

Any leads, I just want this working as soon as I can. But, I do get the hang of how Gentoo works, & I think it is very good to understand how a comuter actually works. And having control over each process.

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

devfs problem is solved; I had appended udev to the end of the kernel line in grub.conf in the next line.
But, I have this problem persisiting.

>>Mounting Filesystem
>>Activating udev
>>Determing root devices

Block device /dev/sda3 is not a valid root device. The root block device is unspecified or not detected.

Does'nt genkernel have drivers for ResierFS ?

Any clues?

Thanks,
NJ

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

A simple search got me the answer.

gento=nodevfs devfs=nomunt corected it. I had not set a passwd for tux, so it did not log me in. I guess I can set it in using LiveCD right.

Thanks
NJ

RayDude · Posted: Fri Jun 10, 2005 6:57 am Post subject:

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

How do you edit the Thread title to place [SOLVED] there?

In any case, I did emerge -pv gnome

there are 173 programs, it took me four hours to install 10 of them. X11 etc. When it came to the eleventh, emerge gave up as it was pkgconfig-0.15.tar.gz, I see pkgconfig there in /usr/lib, but still, I dont think I can add 173 programs. Maybe try XFCE already I have used 1GB for this. But, it took me four hours to compile ten programs.

MaDxRaY · Posted: Fri Jun 10, 2005 6:14 pm Post subject:

NaveenJain · n00b Joined: 06 Jun 2005 Posts: 37

M@dxray:

I agree with you, They should have a sticky. I searched by putting my search string between quotes like

ÄDetermining Root device
>>Block device /dev/sda3 is not a valid root device
>> The root block device is unspecified or not detected. Please specify a devive to boot, or "Shell" for a Shell.Ä

And I got many answers. Apparently doscsi in the kernel line of grub.conf works. The manual is quite explanatory, but I am always in a hurry. They dont have much about sata in it.