Hi,

I have a RedHat 7.2 PC. I updated the kernel from 2.4.7-10 to 2.4.20-19.7 through the RedHat Network (RHN) service automatically. Then I got the following error messages and could not boot it with the new kernel.

kmod: failed to exec /sbin/modprobe -s -k block-major-8, errono=2
VFS: cannot open root device "802" or 08:02
Please append a correct "root=" boot option
kernel panic: VFS: Unable to mount root fs on 08:02

At the moment, I can boot it with the original kernel (when booting, I just select "Linux.bak"). The file of /boot/initrd-2.4.20-19.7(smp) was not created by the RHN updating.

I greatly appreciate your advice. Thank you very much.

------ /etc/lilo.conf --------
prompt
timeout=50
default=linux
boot=/dev/sda
map=/boot/map
install=/boot/boot.b
message=/boot/message
linear

image=/boot/vmlinuz-2.4.7-10smp
initrd=/boot/initrd-2.4.7-10smp
label=linux.bak
read-only
root=/dev/sda2
append="hdc=ide-scsi"

image=/boot/vmlinuz-2.4.7-10
initrd=/boot/initrd-2.4.7-10
label=linux-up.bak
read-only
root=/dev/sda2
append="hdc=ide-scsi"

image=/boot/vmlinuz-2.4.20-19.7
label=linux-up
root=/dev/sda2
append="hdc=ide-scsi"
read-only

image=/boot/vmlinuz-2.4.20-19.7smp
label=linux
root=/dev/sda2
append="hdc=ide-scsi"
read-only
---------EOF of /etc/lilo.conf ----------

-------- /boot/grub/grub.conf ---------
default=4
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz
title Red Hat Linux (2.4.20-19.7smp)
root (hd0,0)
kernel /vmlinuz-2.4.20-19.7smp ro root=/dev/sda2 hdc=ide-scsi
title Red Hat Linux (2.4.20-19.7)
root (hd0,0)
kernel /vmlinuz-2.4.20-19.7 ro root=/dev/sda2 hdc=ide-scsi
title Red Hat Linux (2.4.20-18.7smp)
root (hd0,0)
kernel /vmlinuz-2.4.20-18.7smp ro root=/dev/sda2 hdc=ide-scsi
title Red Hat Linux (2.4.20-18.7)
root (hd0,0)
kernel /vmlinuz-2.4.20-18.7 ro root=/dev/sda2 hdc=ide-scsi
title Red Hat Linux (2.4.7-10smp)
root (hd0,0)
kernel /vmlinuz-2.4.7-10smp ro root=/dev/sda2 hdc=ide-scsi
initrd /initrd-2.4.7-10smp
title Red Hat Linux-up (2.4.7-10)
root (hd0,0)
kernel /vmlinuz-2.4.7-10 ro root=/dev/sda2 hdc=ide-scsi
initrd /initrd-2.4.7-10

--------- EOF of /boot/grub/grub.conf --------------

I would suggest reloading grub?

With lilo, (since I only use that and I assume
it would be the same with Grub) you need to
run the program so it recognises your new kernel.
Not sure how it's done with grub, but typing
/sbin/lilo at prompt is required before rebooting and
starting with a new kernel.


-vexer

Hi Vexer,

Thank you very much for your reply. I tried to execute /sbin/lilo and rebooting, but the situation was the same.
I may need to make /boot/initrd-2.4.20-19.7smp and add a line "initrd=/boot/initrd-2.4.20-19.7smp" to /etc/lilo.conf. However, /sbin/mkinitrd was not working as follows.

% /sbin/mkinitrd /boot/initrd-2.4.20-19.7 2.4.20-19.7
No module pti_st found for kernel 2.4.20-19.7

"pti_st" is defined in /etc/modules.conf as "alias scsi_hostadapter pti_st", but there is no definition in /boot/modules-info.2.4.20-19.7. In /var/log/messages, there is the following lines.

---------- lines from /var/log/messages -------------
Aug 13 14:34:24 RH7.2 kernel: Kernel command line: auto BOOT_IMAGE=linux.bak ro root=802 BOOT_FILE=/boot/vmlinuz-2.4.7-10smp hdc=ide-scsi
Aug 13 14:34:24 RH7.2 kernel: ide_setup: hdc=ide-scsi
Aug 13 14:34:32 RH7.2 kernel: SCSI subsystem driver Revision: 1.00
Aug 13 14:34:32 RH7.2 kernel: scsi0 : PROMISE SuperTrak SX6000 Driver
Aug 13 14:34:32 RH7.2 kernel: Type: Direct-Access ANSI SCSI revision: 02
Aug 13 14:34:32 RH7.2 kernel: Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Aug 13 14:34:32 RH7.2 kernel: SCSI device sda: 714843648 512-byte hdwr sectors (366000 MB)
Aug 13 14:34:32 RH7.2 kernel: scsi1 : SCSI host adapter emulation for IDE ATAPI devices
Aug 13 14:34:32 RH7.2 kernel: Type: CD-ROM ANSI SCSI revision: 02
Aug 13 14:39:45 RH7.2 kernel: Attached scsi CD-ROM sr0 at scsi1, channel 0, id 0, lun 0
Aug 13 14:39:45 RH7.2 kernel: sr0: scsi3-mmc drive: 32x/32x writer cd/rw xa/form2 cdda tray
--------------------------------------------------------------

If you have some idea about it, I'm happy to hear it.
Thank you again.