[blfs-support] kernel panic when booting with connected external disk

Pierre M.R. prousselet at sfr.fr
Sun Mar 17 13:18:32 PDT 2013

Dr.-Ing. Edgar Alwers wrote:
> On Wednesday 13 March 2013 22:34:59 you wrote:
>>> When an external disk is connected from the very beginning (USB),
>>> the boot process of the LFS system stops with a kernel panic:
> First of all, thank you very much for the very extensive answer and all the
> links. We have been working on them, so it took a little of time for us to
> report.
> In order to make this mail small, we put all the answers and additional
> informations in a file to be downloaded.
> Some additional infos:
> 1.) BLFS is still not starting with connected external disk
> 2.) fdisk -l ( see file ) delivers a little comment which I cannot judge:
> "Partition 4 does not start on physical sector boundary"
> 2.) Rootdelay of, let me say, 50 in the grub command, as suggested by Kenno
> Han,does not change the behaviour. But: if the Toshiba disk is connected
> _during_ the delay time, the boot process finish succesfull.
> We would not like to go to heavy arms like gptfdisk at this moment, as we are
> afraid to kill the system. But we think, it is an interesting issue.
> Again, thank you very much.
> Edgar
> Informations, answers etc.:
> http://dl.dropbox.com/u/8734485/Kernel_Panic

Is the external drive bootable, does it have a grub bootloader ?

Can you try to force the ThinkPad to boot on the internal HD, when the 
external one is connected, using its boot menu (key F12 during startup).


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