하쿠마의 이글루

Release Found: Red Hat Enterprise Linux 5

To resolve this issue, Grub must be reinstalled. To reinstall Grub on the multipath device perform the following procedure.

Note: This method has been validated on Red Hat Enterprise Linux 5.1 and 5.2.

1. leave only the mpath0 lun masked. Remove the other luns. This is very important, as writing to the other luns must be avoided.

2. Boot the system in rescue mode.

3. When rescue mode starts, do not search for any partitions, click on 'skip'

4. When the shell is spawned do the following:

   
    # mkdir /mnt/sysimage
    # mkdir /mnt/sysimage/boot
    # multipath -F
    # multipath -v0
    # multipath -l

    

5. Check to see if the mpath0 device is now there, then continue:

   
    # kpartx -a /dev/mapper/mpath0
    # lvm vgscan --config 'devices{ filter = [ "a/mapper/", "r/.*/" ] }'
    # lvm vgchange -ay --config 'devices{ filter = [ "a/mapper/", "r/.*/" ] }'
    # mount -t ext3 /dev/mapper/VolGroup00-LogVol00 /mnt/sysimage/
    # mount -t ext3 /dev/mapper/mpath0p1 /mnt/sysimage/boot/
    # mount -t proc none /mnt/sysimage/proc
    # chroot /mnt/sysimage
    # dmsetup mknodes mpath0
    # dmsetup mknodes mpath0p1
    # dmsetup mknodes mpath0p2 

    

6. In the chrooted environment, verify if /boot/grub/grub.conf is present and corresponds to the correct grub configuration. Also, verify if /boot/grub/devices.map contains the line:

   (hd0) /dev/mapper/mpath0

   If this is the case, run:

   # grub-install /dev/mapper/mpath0

    

7. Reboot the system and verify if it reboots properly.