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I just updated kernel for my Linux:

[root@localhost ~]# cat /etc/redhat-release 
Scientific Linux release 6.1 (Carbon)
[root@localhost ~]# uname -a
Linux localhost.localdomain 2.6.32-131.0.15.el6.x86_64 #1 SMP Tue May 10 15:42:40 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost ~]# 

last few entries from /var/log/messages:

Oct  1 10:22:10 wcmisdlin02 wall[21689]: wall: user root broadcasted 1 lines (8 chars)
Oct  1 10:22:40 wcmisdlin02 NetworkManager[1866]: <info> kernel firmware directory '/lib/firmware' changed
Oct  1 10:22:43 wcmisdlin02 yum[21626]: Updated: kernel-firmware-2.6.32-279.9.1.el6.noarch
Oct  1 10:22:53 wcmisdlin02 yum[21626]: Installed: kernel-2.6.32-279.9.1.el6.x86_64
Oct  1 10:23:05 wcmisdlin02 yum[21626]: Installed: kernel-devel-2.6.32-279.9.1.el6.x86_64
Oct  1 10:23:07 wcmisdlin02 yum[21626]: Updated: kernel-headers-2.6.32-279.9.1.el6.x86_64


[root@localhost ~]# tail /var/log/yum.log | grep "^Oct 01"
Oct 01 10:22:43 Updated: kernel-firmware-2.6.32-279.9.1.el6.noarch
Oct 01 10:22:53 Installed: kernel-2.6.32-279.9.1.el6.x86_64
Oct 01 10:23:05 Installed: kernel-devel-2.6.32-279.9.1.el6.x86_64
Oct 01 10:23:07 Updated: kernel-headers-2.6.32-279.9.1.el6.x86_64
[root@localhost ~]# 

and now it won't boot(, right after I'm seeing GRUB where I can select different version of kernel (I've tried newly installed one AND previous kernel) w/ same results:

Kernel panic - not syncing: VFS: Unable to mount root fs on known-block(0,0)
Pid: 1, comm: swapper Not tainted 2.6.32-279.1.1.el6.x86_64 #1
Call Trace:

I also noticed all "initramfs" files are looks like have been updated (that's probably why I can't boot into old kernel anymore too)

[root@localhost ~]# ls -al /boot/initramfs-2.6.32-279.*
-rw-r--r--. 1 root root 15227261 Oct  1 10:25 /boot/initramfs-2.6.32-279.1.1.el6.x86_64.img
-rw-r--r--. 1 root root 15227720 Oct  1 10:25 /boot/initramfs-2.6.32-279.5.1.el6.x86_64.img
-rw-r--r--. 1 root root 15227774 Oct  1 10:26 /boot/initramfs-2.6.32-279.9.1.el6.x86_64.img
[root@localhost ~]# 

any ideas?

share|improve this question
Just in case, talks about usb stick. – user130370 Oct 1 '12 at 16:08
guy was able to boot old kernel and i'm not( so not helpful – alexus Oct 1 '12 at 16:12
Please read before saying "not helpful" : 1st guy was able to boot old kernel. I was talking about post number 5. – user130370 Oct 1 '12 at 20:15
yes, I read entire thread and no I don't have any USB sticks in my computer that's why it wasn't helpful. (it's not like I downvote you or anything) I appreciate your help/input its just wasn't helpful for my issue. – alexus Oct 1 '12 at 20:59
btw, I also mentioned in my original post that I did tried both of kernels (including newly installed AND previous) w/out any luck – alexus Oct 1 '12 at 21:24
up vote 1 down vote accepted

Kernel panic – not syncing: VFS: Unable to mount root fs on known-block(0,0)

share|improve this answer
Thank you for posting the solution that worked for you. – user130370 Oct 2 '12 at 9:11

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