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Cannot Open Root Device - Was: Unidentified subject!



JAMES MERRITT wrote:

Hi everyone,

I am having a little problem with my Debian Woody. The other day when I tried to boot into Woody, it started the normal text bootup screen before it goes into to KDE graphical login screen. But, during the text portion of the boot up process, it stopped and gave this message:

VFS: Cannot open root device "346" or 03:47. Please append a correct "root=" boot option.
Kernel Panic: VFS: Unable to mount root fs on 03:46.

What does all of this mean, what is going on and what can I do to correct this? I am lost at this point.

Let me encourage you to use a meaningful subject line.

It means that for whatever reason, the system can't find your root partition. Have you upgraded your kernel lately, or switched from ext2 to ext3, or something similar?

Do you have a Debian installation CD, or a Knoppix CD? If so, boot off either of those, then you can mount your hard drive and take a look around to see what might be broken. Perhaps you need to fsck your root partition; perhaps /etc/lilo.conf got changed to point to the wrong partition; perhaps you're dual-booting and Windows got virus-infected which messed with the partition table; perhaps you have a failing hard drive. Any number of things.

--
Kent



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