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unable to open initial console (was: rescue grub -- help!)

Hi Török,

Thank you, that's very helpful. I ended up just installing a new Debian on a different partition; once that was done, the installer agreed to rewrite the MBR, and my old installation showed up in grub. I would much prefer being allowed to rewrite the MBR without first having to install another OS.

Once I got that far, I could boot into the OS I'm trying to rescue; however, I now ran into the dreaded "warning: unable to open initial console". This is also /dev/ related, and this suggests I have a general dev problem with the partition I cloned. Now that I have a parallel partition that is fully operational, is there a way I can repopulate my /dev directory from chroot, or through a script?

Using "mount -o bind /dev /root2/dev", I can now chroot into /root2 and see I have a complete /dev directory, so that for instance I can mount /dev/hda1 on a chrooted /boot. How do I make this happen when I boot directly into that partition? I added this to /etc/fstab:

devpts /dev/pts devpts mode=0620,gid=5 0 0

But it didn't solve the problem. This seems to be a well-defined problem that should have a straightforward solution.

I appreciate your help with this; the partition I'm trying to rescue is in a stable functional state that is no longer possible to duplicate.


Török Edvin wrote:
On 3/24/06, David Liontooth <liontooth@cogweb.net> wrote:
I cloned a drive, starting with the MBR:

  dd if=/dev/hda of=/dev/hdc  bs=446 count=1

However, after installing the cloned drive in the new machine, all I get
is a scrolling GRUB filling the screen. I downloaded an amd64 netboot
CD, mounted / and /boot in /target,

Did you do a mount -o bind /dev /target/dev ?

In the installer shell, I get

~ # df
Filesystem           1k-blocks      Used Available Use% Mounted on
tmpfs                   102400     30248     72152  30% /
/dev/cdroms/cdrom0       86390     86390         0 100% /cdrom
/dev/ide/host0/bus0/target0/lun0/part2  7740384   3197252   4149944  44%
/dev/ide/host0/bus0/target0/lun0/part1    97826      9736     82871  11%
So /dev is not bind mounted in target, try bind mounting it

So it's using devfs, which I thought was deprecated?
AFAIK Sarge CD uses devfs,
but the etch installer uses udev, quote from that bugreport:
"d-i uses the device naming scheme originally used by devfs (although
we use udev now)".

What do I tell
Use devfs naming, /dev/ide/host0/...., see where is the equivalent of hda.

klogd[245]: segfault at 000000000000003e rip 0000002a9568b94e rsp
0000007fbfffe2a0 error 6
How did this segfault happen?

What can I do? All I want is to rewrite the MBR, the installation itself
is fine.
If the netboot CD isnt working for you, could you try using a LiveCD,
like Knoppix?

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