Kernel Panic!

Joel Miller cheeziologist at
Mon Feb 21 13:18:10 PST 2005

Steven Pasternak wrote:
> I just build an LFS 6.0 system (with some newer packages than needed) and when 
> I finally go to boot up, I get this:
> VFS: Cannot open root device 'hdb5' or unknown block (3,69)
> Please append a correct "root=" boot option'
> Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown block 
> (3,69)

Two guesses:
1) Udev is not starting up properly when your system boots and 
consequently you have no device nodes in /dev. There is a file that 
begins with a '.' that if left in the /dev folder will prevent udev from 
loading. I wish I remembered the name, but check the archives for it.
2) You are using serial ata harddrives and don't know that newer 
versions of the kernel give Serial ATA devices SCSI device nodes (i.e. 
/dev/sda5). I know this caught me when I first set up LFS.

Registered LFS User 6929
Registered Linux User 298182

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