[RAS] Nebka disk

[Thomas Krichel]

  Christian Zimmermann writes
> rsync finished, tried the grub-install, it failed:
>
> end_request: I/O error, dev fd0, sector 0
> end_request: I/O error, dev fd0, sector 0
> end_request: I/O error, dev fd0, sector 0
> end_request: I/O error, dev fd0, sector 0
> end_request: I/O error, dev fd0, sector 0
> end_request: I/O error, dev fd0, sector 0
> The file /vol/boot/grub/boot/grub/stage1 not read correctly
>
> I have not touched /etc/fstab/. I have not rebooted. Note that it will  
> reboot into kernel 2.4 by default. I have not restarted rid.
>
> I am out of here. I can get back to the machine room Friday 7:30am EDT.

  You could have woken me up.

  Anyway, having woken up, I did

nebka:~# grub-install --root-directory=/vol /dev/sdb
/dev/sdb does not have any corresponding BIOS drive.

  Googling for this I did

nebka:~# grub-install --recheck --root-directory=/vol /dev/sdb1
Probing devices to guess BIOS drives. This may take a long time.
Installation finished. No error reported.
This is the contents of the device map /vol/boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

(fd0)   /dev/fd0
(hd0)   /dev/sda
(hd1)   /dev/sdb

  We should be ready now to exchange the disks. Take
  the 80G out. Put the 140 into the physical 
  place where the 80G was. Go into the bios to check that the 
  bios sees only the 140G disk. You may have to do 
  this a couple of times, the bios is sometimes
  "slow". Then reboot to Linux, everything should
  start as normal.

  If this fails, put the 80G back and check that
  the bios boots off it. Then you can change the
  root parameter in the 
 
/boot/grub/menu.lst

  The default entry is set on line 12 of this file.
  The numbering starts at 0. It used to be set to 
  2, to prevent firing up the 2.6 kernel. I have
  set it to 0. Thus 

kernel          /boot/vmlinuz-2.6.18-6-686 root=/dev/sda1 ro noacpi noapic

  can be changed to 

kernel          /boot/vmlinuz-2.6.18-6-686 root=/dev/sdb1 ro noacpi noapic

  Then we have the 80G disk in there. In /boot/grub/menu.lst
  change


kernel          /boot/vmlinuz-2.6.18-6-686 root=/dev/sda1 ro single
kernel          /boot/vmlinuz-2.4.27-2-686 root=/dev/sda1 ro noacpi noapic
kernel          /boot/vmlinuz-2.4.27-2-686 root=/dev/sda1 ro single

  to

kernel          /boot/vmlinuz-2.6.18-6-686 root=/dev/sdb1 ro single
kernel          /boot/vmlinuz-2.4.27-2-686 root=/dev/sdb1 ro noacpi noapic
kernel          /boot/vmlinuz-2.4.27-2-686 root=/dev/sdb1 ro single

  and reboot. It then should see the 80G as a boot disk, and
  use the 140G as the root.


  Cheers,

  Thomas Krichel                    http://openlib.org/home/krichel
                                RePEc:per:1965-06-05:thomas_krichel
  phone: +7 383 330 6813                       skype: thomaskrichel