FC6->FC7 Kernel Panic

[Tod]

Tod wrote:
> I'm attempting to upgrade one of my servers from FC6-FC7 on the way to 
> FC8.  I followed all the recommendations including the disk LABELs, etc 
> and everything seemed to work.  But once I rebooted I got a kernel panic 
> because my /boot directory can't be found.
> 
> I have two IDE drives both LVM managed except for a small boot partition 
> on the first drive.  I can boot back to FC6 just fine, but get the 
> kernel panic when I try the FC7 kernel.  My grub.conf looks like this:
> 
> 
> # grub.conf generated by anaconda
> #
> # Note that you do not have to rerun grub after making changes to this file
> # NOTICE:  You have a /boot partition.  This means that
> #          all kernel and initrd paths are relative to /boot/, eg.
> #          root (hd0,0)
> #          kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
> #          initrd /initrd-version.img
> #boot=/dev/hda
> default=0
> timeout=5
> splashimage=(hd0,0)/grub/splash.xpm.gz
> hiddenmenu
> title Fedora (2.6.23.15-80.fc7)
>         root (hd0,0)
>         kernel /vmlinuz-2.6.23.15-80.fc7 ro root=LABEL=/boot
>         initrd /initrd-2.6.23.15-80.fc7.img
> title Fedora Core (2.6.22.14-72.fc6)
>         root (hd0,0)
>         kernel /vmlinuz-2.6.22.14-72.fc6 ro 
> root=/dev/VolGroup00/LogVol00 hdc=ide_scsi
>         initrd /initrd-2.6.22.14-72.fc6.img
> 
> 
> After the first time I booted I changed the FC7 kernel line, it 
> originally looked the same as the FC6 line.  That didn't help.  My fstab 
> looks like this:
> 
> /dev/VolGroup00/LogVol00 /                      ext3    defaults        1 1
> LABEL=/boot             /boot                   ext3    defaults        1 2
> devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
> tmpfs                   /dev/shm                tmpfs   defaults        0 0
> proc                    /proc                   proc    defaults        0 0
> sysfs                   /sys                    sysfs   defaults        0 0
> /dev/VolGroup00/LogVol01 swap                   swap    defaults        0 0
> LABEL=SATA1             /mnt/sata1              ext3    defaults        0 0
> LABEL=SATA2             /mnt/sata2              ext3    defaults        0 0
> 
> The bottom two entries are partitions I have on a supplemental SATA drive.
> 
> sfdisk reports this:
> 
> Disk /dev/hda: 3148 cylinders, 16 heads, 63 sectors/track
> Warning: The partition table looks like it was made
>   for C/H/S=*/255/63 (instead of 3148/16/63).
> For this listing I'll assume that geometry.
> Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
> 
>    Device Boot Start     End   #cyls    #blocks   Id  System
> /dev/hda1   *      0+     12      13-    104391   83  Linux
> /dev/hda2         13     196     184    1477980   8e  Linux LVM
> /dev/hda3          0       -       0          0    0  Empty
> /dev/hda4          0       -       0          0    0  Empty
> 
> Disk /dev/hdb: 77545 cylinders, 16 heads, 63 sectors/track
> Units = cylinders of 516096 bytes, blocks of 1024 bytes, counting from 0
> 
>    Device Boot Start     End   #cyls    #blocks   Id  System
> /dev/hdb1          0+  77544   77545-  39082648+  8e  Linux LVM
> /dev/hdb2          0       -       0          0    0  Empty
> /dev/hdb3          0       -       0          0    0  Empty
> /dev/hdb4          0       -       0          0    0  Empty
> 
> Disk /dev/sda: 30401 cylinders, 255 heads, 63 sectors/track
> Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
> 
>    Device Boot Start     End   #cyls    #blocks   Id  System
> /dev/sda1   *      0+  15199   15200- 122093968+  83  Linux
> /dev/sda2      15200   30400   15201  122102032+  83  Linux
> /dev/sda3          0       -       0          0    0  Empty
> /dev/sda4          0       -       0          0    0  Empty
> 
> Disk /dev/dm-0: 391 cylinders, 255 heads, 63 sectors/track
> 
> sfdisk: ERROR: sector 0 does not have an msdos signature
>  /dev/dm-0: unrecognized partition table type
> No partitions found
> 
> Disk /dev/dm-1: 118 cylinders, 255 heads, 63 sectors/track
> 
> sfdisk: ERROR: sector 0 does not have an msdos signature
>  /dev/dm-1: unrecognized partition table type
> No partitions found
> 
> 
> The ERROR's gave me pause, but I'm booting FC6 ok.  Could this be the 
> problem?
> 
> Any advice would be great.  I can post more information if it would help.
> 
> 
> TIA - Tod
> 

Correction:  The panic is related to the message I get at boot saying 
could not find filesysytem /dev/root.


- Tod