[SOLVED] I can't boot my system

claudiocaldas · 11-22-2011, 06:01 PM

Hi to ALL!

Suddenly my system does not start as if he could not read the hard drive.
I do not see the signal from the LED
But through a live CD can mount the partitions of the system and data.
I use Ubuntu 11.04 with Grub2. Is it the case I reinstall it in the MBR?
The following commands can solve my problem?

# mount-t ext4 /dev/sda1 /mnt/system - o rw
# chroot /mnt/system
# grub-install /dev/sda

I thank to you

GlennsPref · 11-22-2011, 07:32 PM

Hi, I would check the bios settings to see if the drive is enabled to boot from,

ie, first disk is sata or ide, not raid or cd-rom/removeable flash drives.

See how you go.

if that is good, check where the grub is installed, generally /boot with some config set in MBR for grub2 versions

Regards Glenn

claudiocaldas · 11-23-2011, 04:30 AM

Hi Glenn and ALL who are reading!
Yes, the hard drive is SATA and it is enabled for boot, I checked in the BIOS.
The boot files are in /boot
But I don't know how to check where is the grub was installed. How can I check if the bootloader are in the MBR or root partition?
Ubuntu 11.04 uses Grub 2...

Thanks for help!

Larry Webb · 11-23-2011, 06:17 AM

Quote:

Originally Posted by claudiocaldas

But through a live CD can mount the partitions of the system and data.
I use Ubuntu 11.04 with Grub2. Is it the case I reinstall it in the MBR?
The following commands can solve my problem?

# mount-t ext4 /dev/sda1 /mnt/system - o rw
# chroot /mnt/system
# grub-install /dev/sda

I thank to you

From the live cd run these commands

sudo mount /dev/sda1 /mnt

sudo grub-install --root-directory=/mnt /dev/sda

This should get you going,

Most of the grub files will reside in /boot, there are a few in the mbr pointing to the partition where the distro / is installed.

jefro · 11-23-2011, 03:37 PM

Why wouldn't the live cd be sda?

Larry Webb · 11-23-2011, 04:36 PM

Quote:

Originally Posted by jefro

Why wouldn't the live cd be sda?

Most linux distros will list the cdrom or dvdrom are listed as /dev/SRO or cdrom or media.

If there is a single hd I have always found them to be sda or hda.

claudiocaldas · 11-23-2011, 04:46 PM

Hi to ALL!
I solved my problem reinstalling the system.
My data were in another partition than the system and then I had no problem. The big problem is I have to reinstall all software and plugins.
Thanks for all who helped me.