On 11/2/07, harsha reddy harsha@linuxmail.org wrote:

I have following questions to you:

To which partition did you install the grub?

/dev/sda9

Did you make sure that the partition(s) names picked up when booting are

same as the partition names when you installed debian?

well, while booting after installtion. It is not recognising my /dev/sda device. even though my BIOS is dectecting and grub installed from the MBR of my external hard disk(/dev/sda) is showing files inside the /dev/sda9 partition. I think this is the root problem.

Do you have same version of Debian installed on the internal Hard disk as

well as external hard disk?

I dont have any ext2/3 partition in my internal hard disk.

some thing like the hard disk is detected as hda when connected as primary

master. and when connected to secondary master the same harddisk is detected as hdc. (this is the most general case).

That is the interesting part while kernel is loading it is only detecting hda: IC25N030ATMR04-0, ATA Disk drive hdc: HL-DT-STDVD-ROM GCR8083N,ATAPI CD/DVD-ROM drive

which are my internal hard disk and dvd rom.

I had install Debain on /dev/sda9, external usb harddisk. My internal harddisk does not contain any info about Debain or Grub. I installed grub on my external hard disk's MBR. so when I boot from external usb. it prompts.

This is my configuration of grub which is installed in external hard disk

kernel (hd0,8)/boot/bzImage root=/dev/sda9 nomce quit splash=initrd rootdelay=15

it is (hd0,8) since grub is identifying my external hard disk as so. But I am giving root=/dev/sda9 since it is an external hard disk.When I try to identify the device from knoppix that partition is recognised as /dev/sda9 ( also it was same while the time of installation)

but for the above configuration I was getting the following error message.

VFS: Cannot open root device "sda9" or 08"09 Please append a correct "root=" boot option kernel Panic:VFS: Unable to mount root fs on 08:09

but if I give the grub argument as

kernel (hd0,8)/boot/bzImage root=/dev/hda9 nomce quit splash=initrd rootdelay=15

(which is wrong) But I give as a try.

hda9: bad access: block=2,count=2 end_request: I/O error,dev 03:09(hda),sector 64 isofs_read_super: bread failed,dev=03:09,iso_blknum=16,block=32 Kernel panic:VFS:Unable to mount root fs on 03:09

Also I noted one thing, while boot is proceeding, the kernel is not dectecting the sda interface, even though i recompiled the kernel with most usb modules as kernel inbuilt.

hope I am clear.

I try to boot the /dev/sda9 device with puppy linux making another option in grub by coping kernel and initrd to the same partition(into a /puppy directory), I could boot in to puppy from the ext usb hdd.

----- Original Message -----

...

From: "Shyam S" shmkmrs@gmail.com To: fsug-bangalore@mm.gnu.org.in Subject: [FSUG-Bangalore] Debian Boot from external USB Hard Disk Date: Fri, 2 Nov 2007 10:51:52 +0530

Hi,

I am recently a problem in installing Debain GNU/Linux on my external hdd for my laptop. The laptop had boot from external HDD option. I install the Debain base system on the external hdd and grub was successfully installed but when I try to boot from the external hdd device the booting halted showing the following error message.

Warning: unable to open an initial console. Kernel panic - not syncing: no init found. try passing init= option to

kernel

...

Thanks for any input/suggestion you may have

Regards Shyam

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