Failed to open the device /dev/hdb3: No such file or [FIXED]

localghost · Last edited by localghost on Sun Oct 31, 2004 8:59 am; edited 2 times in total

I searched this forum for two days before I dared to register and post this question. I found some great info here that solved all my grub problems, but now I think I have an fstab problem. I'm sure the problem is staring me in the face but I need a fresh look from the outside before I get a headache.

So far for the excuse intro, here comes the problem description.
When I boot, I get the following error message:

Maedhros · Posted: Thu Oct 28, 2004 8:53 pm Post subject:

I would be guessing that if you've set the booting disk to be hdb, you've probably confused Linux into thinking it's set up on hda. Try changing things in your /etc/fstab and /boot/grub/grub.conf to say hda instead.

Another thing I've noticed, is that Windows is going to complain if it thinks it's not on the first disk. I think the easiest thing to do is change the booting order back again, and install grub onto the MBR of the first disk. That way, Windows can be easily loaded from grub, and everything really should be hdb in Linux.
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localghost · Posted: Thu Oct 28, 2004 9:53 pm Post subject:

Maedhros: thank you for your fast reply.

I was already pretty sure that my grub configuration was correct, because I found that somewhere on the Gentoo forum, don't remember where.
But to be sure, I tried your suggestion (the easiest thing to do etc...):
- installed grub on the MBR of hda (Windows won't like me for that but the feeling is mutual :wink:

)
- changed nothing in /etc/fstab: everything points to /hdb as it should
- changed /boot/grub/grub.conf: (hd1,0) is now (hd0,0)
- changed the boot order in the BIOS

Result: exactly the same error. From that I conclude that my initial Grub configuration was not wrong and did not cause the error.

Anyway, some more info. After the error, I can enter the root password or press Contrl+D to continue (=reboot).
When I enter the root password and type mount, I can see that /dev/hdb3 is mounted, as reiserfs. However the file system is read-only: I tried to change /etc/fstab and I couldn't save it.

Any ideas?

trakon88 · Posted: Thu Oct 28, 2004 10:10 pm Post subject:

Maybe you should set this to no! >> CONFIG_4KSTACKS=y I have a similar problem ...
tell me if this helped ...

greetings aleX

Kakalaky · n00b Joined: 05 Oct 2004 Posts: 15

I have the same problem. If you figure anything out, let me know. I doubt its fstab or grub since I got gentoo to work a few days ago with the same fstab and grub.conf.

Kakalaky · n00b Joined: 05 Oct 2004 Posts: 15

BTW, I don't have CONFIG_4KSTACKS set to yes.

[edit] Most likely has something to do with the partition being read only. Both of us have this problem and I have never seen it before.

cokey · Advocate Joined: 23 Apr 2004 Posts: 3355

try this for me:

Kakalaky · n00b Joined: 05 Oct 2004 Posts: 15

looks like it might be a baselayout problem.
https://forums.gentoo.org/viewtopic.php?p=1690666#1690666

trakon88 · Posted: Fri Oct 29, 2004 8:23 am Post subject:

Hi again,

I solved the problem by emerge udev-039, then genkernel --udev --gensplash all
my grub.conf looks like this:
kernel (hd0,1)/kernel-2.6.8-gentoo-r10 udev root=/dev/ram0 init=/linuxrc real_root=/dev/hda3 video=vesafb:1024x768-32@60,mtrr,ywrap splash=silent,theme:emergence

now I can boot as it used to be; maybe that kind of fundamental changes in genkernel should be better documented ...

greetings aleX

To · Posted: Fri Oct 29, 2004 8:28 am Post subject:

I had a similar problem, I just don't know if the problem was with udev or the baselayout that was on the portage for 1 day. But then again... I didn't do an etc-update and the computer was turned off by a lightning :lol:

Tó
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localghost · Posted: Fri Oct 29, 2004 5:45 pm Post subject: SOLVED!

The problem is solved, admin can close this thread.

I did the following stuff:

Changed CONFIG_4KSTACKS to no and recompiled kernel (suggested by trakon88)
Edited grub.conf: (suggested by cokehabit)

Code:

title=Gentoo Linux 2.6.9-r1
root (hd0,0)
kernel /kernel-2.6.9-gentoo-r1 root=/dev/hdb3
emerge --sync (my own idea)
emerge baselayout (suggested by Kakalaky)
emerge udev (suggested by trakon88)
etc-update (my own idea)

One of these things must have been the solution. Thank you everybody for helping out!

cokey · Advocate Joined: 23 Apr 2004 Posts: 3355

change the title to "Failed to open the device /dev/hdb3: [FIXED]"
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Kakalaky · n00b Joined: 05 Oct 2004 Posts: 15

All I did was emerge baselayout after reading the thread I linked to and mine worked. Either way, we are both up and running again!