Hi all,
I'm having a strange problem in which a certain box won't boot
any kernel newer than 2.6.18-53.
I have a kickstart setup that installs a CentOS 5.1 base (which comes
with kernel 2.6.18-53), and then I do a "yum update" to 5.3.
However, when 2.6.18-164 gets installed, the box is rebooted, and it
dumps me in a grub prompt. If I manually enter root, kernel, initrd and
boot commands and point it at the -164 kernel, I am given "Error 13:
invalid or unsupported executable format."
But I can manually enter the -53 kernel and that boots fine.
I tried backing down to the -128 and same problem.
(all our updates come from our own mirrored repos and we only sync i386
directories)
I enabled the menu and selected -164, and it gave me Error 13 the first
time, and subsequent selects of the menu item resulted in Error 15:
File not found.
Now all of the above was with a separate /boot partition.
Box is a dual core Xeon (E8500) with hardware SATA RAID on board.
I'm pretty sure the old boxes were the same spec (but I don't have them
onsite so can't verify that) and they successfully booted the -128
kernel.
I've since rebuilt it with a single / partition. I then did all the
updates, and updated my grub.conf to the following:
default=0
timeout=5
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
#hiddenmenu
title CentOS (2.6.18-53.el5)
root (hd0,0)
kernel /boot/vmlinuz-2.6.18-53.el5 ro root=LABEL=/
initrd /boot/initrd-2.6.18-53.el5.img
title CentOS (2.6.18-164.el5)
root (hd0,0)
kernel /boot/vmlinuz-2.6.18-164.el5 ro root=LABEL=/
initrd /boot/initrd-2.6.18-164.el5.img
The menu came up but only showed the -53 option.
The most common answer I seem to find with Grub's Error 13 is that a
different architecture kernel was installed, but they're all the same;
ie; i686 kernel from i386 repo.
[root@dhcp-248 boot]# file vmlinuz-2.6.18-53.el5
vmlinuz-2.6.18-53.el5: ELF 32-bit LSB shared object, Intel 80386, version 1, stripped
[root@dhcp-248 boot]# file vmlinuz-2.6.18-164.el5
vmlinuz-2.6.18-164.el5: ELF 32-bit LSB shared object, Intel 80386, version 1, stripped
current running kernel is:
Linux dhcp-248.off.knossos.net.nz 2.6.18-53.el5 #1 SMP Mon Nov 12 02:22:48 EST 2007 i686 i686 i386 GNU/Linux
[root@dhcp-248 ~]# rpm -qa | grep kernel
kernel-2.6.18-53.el5
kernel-2.6.18-164.el5
[root@dhcp-248 ~]# yum list kernel*
Loaded plugins: fastestmirror
Determining fastest mirrors
knl-base 2508/2508
knl-gen 42/42
knl-updates 528/528
Installed Packages
kernel.i686 2.6.18-53.el5 installed
kernel.i686 2.6.18-164.el5 installed
Available Packages
kernel-PAE.i686 2.6.18-164.el5 knl-updates
kernel-PAE-devel.i686 2.6.18-164.el5 knl-updates
kernel-debug.i686 2.6.18-164.el5 knl-updates
kernel-debug-devel.i686 2.6.18-164.el5 knl-updates
kernel-devel.i686 2.6.18-164.el5 knl-updates
kernel-doc.noarch 2.6.18-164.el5 knl-updates
kernel-headers.i386 2.6.18-164.el5 knl-updates
kernel-xen.i686 2.6.18-164.el5 knl-updates
kernel-xen-devel.i686
2.6.18-164.el5 knl-updates
[root@dhcp-248 ~]# cat /etc/fstab
LABEL=/ / ext3 defaults 1 1
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
LABEL=SWAP-isw_dgcfec swap swap defaults 0 0
[root@dhcp-248 ~]# fdisk -l
Disk /dev/sda: 251.0 GB, 251059544064 bytes
255 heads, 63 sectors/track, 30522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 30391 244115676 83 Linux
/dev/sda2 30392 30522 1052257+ 82 Linux swap / Solaris
Disk /dev/sdb: 251.0 GB, 251059544064 bytes
255 heads, 63 sectors/track, 30522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 30391 244115676 83 Linux
/dev/sdb2 30392 30522 1052257+ 82 Linux swap / Solaris
[root@dhcp-248 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 226G 1.3G 213G 1% /
tmpfs 504M 0 504M 0% /dev/shm
--
Spiro Harvey Knossos Networks Ltd
021-295-1923 www.knossos.net.nz
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