Solved

qemu on ubuntu 8.04 giving error VFS:Cannot open root device "hda" or unknown-block(0,0)

Posted on 2008-06-16
5
2,151 Views
Last Modified: 2008-11-03
I am running following command:
sudo qemu  -m 32 -kernel data/linux-2.6.23/arch/i386/boot/bzImage -append "root=/dev/hda" -hda linux_i386.img  -boot c
it gives me following error in qemu window:
VFS can not open root device "hda "

please append correct root= boot option  

kernel panic:not syncing :VFS :Unable to mount root fs on unknown-block(0,0)
0
Comment
Question by:hirakpatel
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 13

Expert Comment

by:MicheleMarcon
ID: 21800175
Have you prepared the linux_i386.img image file?

qemu-img create ...
0
 

Author Comment

by:hirakpatel
ID: 21800505
I am using it from sit called free electrons to leran kernel programming.
how to check linux_i386.img ?
how to use qemu-img create ...?
REMEMBER:I am using kernel parameter and giving linux kernel image which I build for pentium pro processor.
0
 
LVL 5

Expert Comment

by:pointerstop
ID: 21801562
I don't know qemu, but I do know disks, and /dev/hda is a _disk_, not a partition.  Booting from a normal disk, you would need to use /dev/hda1 (or hda2 for the second partition, etc)
0
 
LVL 13

Accepted Solution

by:
MicheleMarcon earned 500 total points
ID: 21801879
Take a look here (jump to "create the environment")

http://ubuntu-tutorials.com/2007/07/04/setting-up-qemu-kqemu-on-ubuntu-704-feisty/

You basically need to create the virtual hard disk where the virtualized PC will live.
If you downloaded the .img file you need to insert this file on the command.
0
 

Author Comment

by:hirakpatel
ID: 21805974
thanks everyone I got solution I have to enable ramfs support in kernel.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I. Introduction There's an interesting discussion going on now in an Experts Exchange Group — Attachments with no extension (http://www.experts-exchange.com/discussions/210281/Attachments-with-no-extension.html). This reminded me of questions tha…
Join Greg Farro and Ethan Banks from Packet Pushers (http://packetpushers.net/podcast/podcasts/pq-show-93-smart-network-monitoring-paessler-sponsored/) and Greg Ross from Paessler (https://www.paessler.com/prtg) for a discussion about smart network …
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question