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Old 02-14-2010, 10:08 PM   #1
pgb205
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System Boots From grub.conf in unknown location


I've upgraded my centos box to a new kernel and when looking at
/etc/boot/grub/grub.conf I do see old and new kernel lines.
When rebooting however the old kernel is still the only option.
I've searched entire drive for any other grub.conf files but found nothing. I've even tried rename the new vmlinuz file to have the same filename as the old one so that maybe then that mysterious grub.conf would pick up the new kernel but no luck--the old kernel is still being booted up. There are two hard drives in the box and they are raid1 mirrored.
 
Old 02-14-2010, 11:58 PM   #2
LazerPhreak
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Hello there!

Please open a terminal and type
Code:
sudo update-grub
and restart. If that does not work, please post any errors.
 
Old 02-18-2010, 06:15 PM   #3
pgb205
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Quote:
Originally Posted by LazerPhreak View Post
Hello there!

Please open a terminal and type
Code:
sudo update-grub
and restart. If that does not work, please post any errors.
I don't believe centos has this script, unlike ubuntu
 
Old 02-19-2010, 10:03 AM   #4
JimBrewster
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Look for /boot/grub/menu.lst (**N.B. the extension is "lowercase-L s t" not "one s t".**)

If you don't find anything in /boot/ look at /etc/fstab and see if /boot is listed as a mount point. If it shows up in /etc/fstab but not when you run 'df', then try 'sudo mount /boot.' Then look again for /boot/grub/menu.lst .
 
Old 02-19-2010, 02:54 PM   #5
pgb205
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Quote:
Originally Posted by JimBrewster View Post
Look for /boot/grub/menu.lst (**N.B. the extension is "lowercase-L s t" not "one s t".**)

If you don't find anything in /boot/ look at /etc/fstab and see if /boot is listed as a mount point. If it shows up in /etc/fstab but not when you run 'df', then try 'sudo mount /boot.' Then look again for /boot/grub/menu.lst .
menu.lst on centos is just a link to /boot/grub/grub.conf

I see entries for both old and new kernel. But upon reboot as stated previously only old kernel is seen.
 
Old 02-19-2010, 03:07 PM   #6
LazerPhreak
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http://www.beginlinux.com/server_tra...v_admin_m/grub

Try following this tutorial, see if that helps at all.
 
Old 02-19-2010, 04:10 PM   #7
pgb205
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Quote:
Originally Posted by LazerPhreak View Post
http://www.beginlinux.com/server_tra...v_admin_m/grub

Try following this tutorial, see if that helps at all.
Now I get this (as root)

grub-install hd0
/dev/sda1 does not have any corresponding BIOS drive.


even though 'mount' shows

/dev/sda1 mounted on /
/dev/sda3 mounted on /home

after trying grub-install --recheck /dev/sda I get
grub-install does not support reporbing of device.map when
using a device-mapper based boot device.

does this mean i have either soft or hard raid running and if so
what other options to I have to fix this issue.

ls /dev/mapper <ENTER>
control

and nothing else

Last edited by pgb205; 02-19-2010 at 04:21 PM.
 
  


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