Disk problems - continuing saga

[Gordon Low]

Have tried recompiling initrd with the ext3 module but still having
problems. 

Done this for initrd but when I booted same thing happened. 
Said I was having problem seeing image from the "linux rescue" disk,
checked and found it could not see / directory (all others were loaded
when I cd'd into what was loaded) so reformatted this partition and
copied files over. Now seem to be able to connect ok. Used 
       "mkfs -t ext3 -c /dev/hdb5"    and 
       "fsck.ext3 -f /dev/hdb5" to check 
Checked in the kernel log to see what differences occur on loading and
found the following - if anyone can see exactly what problem could be
would be grateful for help.

New disk  - changed grub.conf to kernel /vmlinuz-2.4.20-28.8 ro root=/
and done the mkinitrd -f -v initrd-kernelversion.img kernelversion
===============================================================
.
VFS: Mounted root (ext2 filesystem)
Red Hat nash version 3.4.28 starting
Loading jbd module
Journalled Block Device driver loaded
Loading ext3 module
Mounting /proc filesystem
Creating block devices
Creating root device
Mounting root filesystem
mount: error 6 mounting ext3
pivotroot: pivot-root(/sysroot, /sysroot/initrd) failed: 2
umount /initrd/proc failed: 2
Freeing unused kernel memory: 132k freed
Kernel Panic: No init found. Try passing init= option to kernel
.
===============================================================

Old disk which mounts ok - this uses LABEL in grub.conf
===============================================================
.
VFS: Mounted root (ext2 filesystem)     
         <<< missing "nash and "loading jbd" entries >>>
Journalled Block Device driver loaded
kjournald starting. Commit interval 5 seconds   <<< new
EXT3-fs mounted file system with ordered data mode <<< new
Loading ext3 module
Mounting /proc filesystem
Creating block devices
Mounting root filesystem
Freeing unused kernel memory: 132k freed
.
===============================================================


On Tue, 2004-11-09 at 11:09, Rick Stevens wrote:
> Gordon Low wrote:
> > Still having problems replacing 40G disk with a 120G Barracuda disk but
> > think I have made progress with advice from Bob. 
> > 
> > Copied the files using the cpio archive command and rebooted into the
> > "linux rescue" mode straight away. Installed grub and rebooted to the
> > new HD.
> > 
> > This time grub was invoked and I was given menu as I had before. Carried
> > on booting but was stopped with a 
> > "Kernel Panic: No init found. Try passing init= option to kernel"
> > 
> > Couldn't remember if I had just copied the /proc directory so I deleted
> > it on the new disk and added as an empty directory - same thing
> > happened. Sequence of boot was as follows..
> > ===============================================================
> > .
> > Mounting /proc filesystem
> > Creating block devices
> > Creating root device
> > mkrootdev: label / not found
> > Mounting root filesystem
> > mount: error 2 mounting ext3
> > pivotroot: pivot-root(/sysroot, /sysroot/initrd) failed: 2
> > umount /initrd/proc failed: 2
> > Freeing unused kernel memory: 132k freed
> > Kernel Panic: No init found. Try passing init= option to kernel
> > .
> > ===============================================================
> > 
> > Thought this might be grub.conf as I noticed it had entry..
> > kernel /vmlinuz-2.4.20-28.8 ro root=LABEL=/
> > so changed this to 
> > kernel /vmlinuz-2.4.20-28.8 ro root=/
> > During this period the linux rescue could sometimes mount the
> > filesystems but had trouble at other times don't know if this is
> > relevant?
> > 
> > After this still failed but slightly different messages - sequence was
> > as follows....
> > 
> > ===============================================================
> > .
> > Mounting /proc filesystem
> > Creating block devices
> > Creating root device      <<<<<< no mkrootdev failure >>>>
> > Mounting root filesystem
> > mount: error 6 mounting ext3   <<<<< different error  >>>>
> > pivotroot: pivot-root(/sysroot, /sysroot/initrd) failed: 2
> > umount /initrd/proc failed: 2
> > Freeing unused kernel memory: 132k freed
> > Kernel Panic: No init found. Try passing init= option to kernel
> > .
> > ===============================================================
> > 
> > Desperately need some help here as this is dragging on, I can install
> > RH8 from new onto the new disk but want to transfer old system. 
> > Will be googling for the errors but can anyone point me in direction of
> > where to go now.
> 
> The problem is that you have to rebuild the initrd image in /boot.  This
> is because you're using an ext3 filesystem for / and ext3 is not built
> into your kernel.
> 
> First, note which version of kernel you intend to run when this hard
> disk boots.  Then boot off the CD in rescue mode and let the system
> mount the system under /mnt/sysimage.  Next:
> 
> 	# chroot /mnt/sysimage
> 	# cd /boot
> 	# mkinitrd -f -v initrd-kernelversion.img kernelversion
> 	# exit
> 	# exit
> 
> Replace "kernelversion" with the kernel you want to boot.  E.g., for
> the latest FC1 kernel:
> 
> 	# mkinitrd -f -v initrd-2.4.22-1.2199.nptl 2.4.22-1.2199.nptl
> 
> Pop out the CD and try to boot the hard disk.
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> -         "OK, so you're a Ph.D. Just don't TOUCH anything!"         -
> ----------------------------------------------------------------------
> 
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