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

Pierre M.R. prousselet at sfr.fr
Wed Mar 20 04:03:54 PDT 2013

Dr.-Ing. Edgar Alwers wrote:
> On Monday 18 March 2013 00:37:25 Michael Shell wrote:
>> Anyway, before you do anything, what we want to see what name the
>> Toshiba and sda partitions are given when the Toshiba drive is
>> already connected during boot.
>> However, there is a big problem with getting that crucial information
>> isn't there? Namely, that you can't just get it from a dmesg because
>> the system will fail to boot.
> We partially solve this problem taking pictures of the boot messages: we put a
> rootdelay= 50.
> Kernel-1.jpg shows the boot process before the delay, Kernel-2.jpg shows the
> process after delay, until panic. ( LFS partition, external disk connected )
> You may find also the partition tables for sda and for the external disk sdb
> as well as the dmesg results in the included files
> Regards,
> Edgar
> http://dl.dropbox.com/u/8734485/Kernel_Panic_2/dmesg-sda-sdb-18032013
> http://dl.dropbox.com/u/8734485/Kernel_Panic_2/Gparted-sda.png
> http://dl.dropbox.com/u/8734485/Kernel_Panic_2/Gparted-sdb.png
> http://dl.dropbox.com/u/8734485/Kernel_Panic_2/Kernel-1.JPG
> http://dl.dropbox.com/u/8734485/Kernel_Panic_2/Kernel-2.JPG
Kernel-1.JPG shows sda-1to8 and sdb-1to11. I would conclude that, in 
this case, the laptop boots from the external HD.


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