Mailinglist Archive: opensuse (3666 mails)

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Re: [SLE] Recover question - no kernel
  • From: Moby <moby@xxxxxxxxxxxxxx>
  • Date: Wed, 30 Mar 2005 20:32:47 -0600
  • Message-id: <424B614F.7080403@xxxxxxxxxxxxxx>
Stephen, thank you very much for your help. I followed your suggestion of mounting sysfs and reinstalled the kernel from the binary RPMS. However, I still get the same error on a reboot. Everything works fine during bootup until it hangs. The last lines prior to hanging are :

Loading kernel/fs/reiserfs/reiserfs.ko
Waiting for device /dev/hda4 to appear:..... Not found --exiting to /bin/sh
sh: Can't access tty; job control turned off

After that I sit at the shell prompt. I would appreciate any help at all in getting this machine back. I shall try the reinstall with the repair option if nothing else works. I am hesitant to do that though for fear it may mess up any installed RPMs on the machine, as it has a number of applications installed on it.

Stephen Boddy wrote:

On Wednesday 30 March 2005 23:30, Moby wrote:

I have a need to reinstall the kernel on a SuSE 9.2 box using the install CDs and booting into rescue mode. The original root partition was at /dev/hda4 and the original /boot was /dev/hda2. Both / and /boot are resierfs. Kernel source and binary RPMS exist on the original / (/dev/hda4) under /home/raw/kernel. Here at the steps I am taking and the issue I keep on facing:

1) Boot off SuSE 9.2 CD1, choose Rescue, login as root.
2) cd /mnt. Then mkdir t4. Then mount /dev/hda4 /mnt/t4.
3) chroot /mnt/t4.
4) mount /dev/hda2 /boot

At this point, my file system is back the way it used to be before I destroyed the kernel. Now to install the kernel I have tried using the binary rpms as well as compiling the installing from sources. The problem is that both steps, installing the binary RPMs or making from source, apparently look for information under /sys. In my case, /sys goes away at step (3) above. I understand /sys is a "virtual" file system. My question is how do I get my kernel back? I would like to install a binary RPM instead of compiling and installing my own. However, even when installing from the binary RPM, I see complaints about being unable to find items under /sys. I think this makes it unable to produce a proper initrd, and as a result of which, even though the RPM appears to install fine and I see all the proper looking files at all the right places, on a reboot the machine complains about waiting for /dev/hda4 and then gives up.

It seems that the use of /sys severely hinders a quick recovery, such as simply booting as in steps (1) through (4) above and installing the binary kernel RPM.

Thanks in advance for any help

Might be stating the bleeding obvious but doesn't mounting sysfs to the appropriate place before chroot'ing work? i.e.
mount sysfs /mnt/t4/sysfs -type sysfs

Failing that have you tried going into the Install section of the CD's and choosing to repair the installation? (This is the first question it asks if it detects a previous install.)


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