February 15, 2010

Linux System Unbootable Post Kernel Upgradation

A kernel in Linux operating system is like a mediator between the hardware and programs. The memory management program ensures a systematic contact between the hardware and the programs, and all programs get appropriate share in the processor's cycle. A Kernel is upgraded mainly when you need a device driver for a new hardware. A new Kernel is easily available on the Internet. While upgradation of Kernel is an easy task, it might result into a bootable error message. This error message halts the booting process of your system, resulting into inaccessibility of all the hard drive data. In such situations, an updated acts as a life-saver and allows you to restore the data. But, with numerous instances of backup unavailability and corruption, you always have an option to use advanced Linux Recovery software.

Consider a practical case, where you upgrade your Kernel and you encounter the below error message while booting your system:

“Should I run /sbin/lilo? (y/N) y
Warning: The boot sector and map file are on different disks.
Added Gentoo-2611-r9 *
Added Gentoo-2611-r8
Added Gentoo-2611-r6
Fatal: First sector of /dev/hda1 doesn't have a valid boot signature
There was a problem running /sbin/lilo.

Checking for SILO...No

Checking for PALO...No

Should I make a bootdisk? (y/N) n

WARNING: Your system is probably unbootable now.  After correcting any
problems, rerun this script with the command `mkboot -installkernel'.
make[1]: *** [install] Error 1
make: *** [install] Error 2”

After the above error message appears, the data saved on your hard drive becomes inaccessible.

Cause:

The above error message pops up in case the new upgrade is not compatible with the system, or the upgrade was not performed systematically.

Resolution:

The resolution for the above error message is discussed below:

Run FSCK command in boot partition.

If the problem persists, format your hard drive.

While formatting allows you to isolate the above error message, it also deletes all the saved data from your Linux-based hard drive. In such cases, if you wish to recover your formatted data, then you will need to use advanced third-party Linux Recovery application. A Linux Data Recovery tool is easy to implement and does not requires any prior technical knowledge.

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