Home > Cannot Open > Vfs Cannot Open Root Device Null Or Unknown-block2 0

Vfs Cannot Open Root Device Null Or Unknown-block2 0

Contents

At the very least, you learned a little bit more about systematic problem solving, Kdump command line and init script, memory allocations under /proc, how to edit the kernel configuration, and Does Intel sell CPUs in ribbons? You are currently viewing LQ as a guest. Password Linux - Newbie This Linux forum is for members that are new to Linux. http://rinfix.com/cannot-open/vfs-cannot-open-root-device-nfs-or-unknown-block2-0.html

Code: VFS: Cannot open root device "(null)" or unknown-block(2,0): error -6 Please append a correct "root=" boot option; here are the available partitions: 0b00 1048575 sr0 driver: sr Kernel panic - While some of the items may not be applicable for the Kdump kernel, you will get a pretty good indication if you're trying to do something that conflicts with reserved segments. Conclusion The VFS error boils down to two things: Kdump command line and initrd modules. I hope this article sheds some light on your woes.

Vfs Cannot Open Root Device Unknown-block(0 0)

When a kernel module loads, I get an error like the following: "cmem: disagrees about version of symbol module_layout". If that is the case and it were my server, I would not try to override that and instead find another setup that would work in its place. Scheduling it for restart. Results 1 to 4 of 4 Thread: Loading Ubuntu Server over TFTP, getting Kernel Panic on client.

The problem will usually manifest after kernel upgrades. How can I solve this? Check if the kernel that is being boot by the boot loader is the correct kernel. Cannot Open Root Device Mapper/volgroup-lv_root Where should I append the correct root= option?

Code: LABEL Ubuntu Server CloudNode DEFAULT vmlinuz-3.5.0-23-generic APPEND root=dev/nfs initrd=initrd.img nfsroot=10.0.0.200:/NFSROOT/ ip=dhcp rw And the clients loads the vmlinuz-3.5.0-23-generic But under the boot process they stalls with this error. Vfs Cannot Open Root Device Please Append A Correct Root Boot Option If this works with NFS but not with initramfs than I would be suspect that your cmemk.ko files in each filesystem are not the same, or that the kernel uImage file http://www.serenux.com/2010/05/howto...ubuntu-server/ and http://www.serenux.com/2010/05/howto...-a-pxe-server/ and the official pxeboot help from help.ubuntu.com. Here's an example: cat /proc/iomem 00000000-0009dbff : System RAM 0009dc00-0009ffff : reserved 000a0000-000bffff : Video RAM area 000c0000-000cafff : Video ROM 000f0000-000fffff : System ROM 00100000-bf61ffff : System RAM 00100000-002f684d :

It can be sdb4, sdc6 or something else. Vfs Cannot Open Root Device Mapper No license, either express or implied, by estoppel or otherwise, is granted by TI. here's my config command line argument in the .config CONFIG_CMDLINE_BOO CONFIG_CMDLINE="root=/dev/nfs rw nfsrootdebug nfsroot=192.168.0.2:/home/rootfs rdinit=/sbin/init console=ttyS0,9600n8 ip=192.168.0.20:192.168.0.2:192.168.0.2:255.255.255.0:eth4:eth4ff raid=noautodetect" CONFIG_CMDLINE_OVERRIDE=y hi xode, the client is running vanilla kernel download from kernel.org (version i also turned off CONFIG_BLK_DEV_INITRD (tried it on as well but did not make any difference.) tcpdump on the server side shows NFS requests but i don't how to interpret these

Vfs Cannot Open Root Device Please Append A Correct Root Boot Option

Assigning only part of a string to a variable in bash What is a satisfactory result of penetration testing assessment? Again, we need to refer to /proc in our running kernel and see what is currently in use. Vfs Cannot Open Root Device Unknown-block(0 0) Several reasons can result in such a failure: the kernel configuration is missing drivers for your HDD controller (cases 1, 4, 5) the kernel configuration is missing drivers for the bus Vfs Cannot Open Root Device Redhat Whatever the exact match, the problem is identical.

Within the menuconfig, you can type "/" to open the search function, and type in the driver name to find out where it resides. # lspci -n Check if you have http://rinfix.com/cannot-open/vfs-cannot-open-root-device-null-or-unknown-block.html Like the Ubuntu initrd issue, the solution is none of the suggested items, so please read and learn how to handle this properly. If you read the newspaper, you're mis-informed. - Mark Twain Thinking about becoming an Ubuntu Member? Attempting defaults... 后来发现busybox生成的文件系统根目录下并没有linuxrc,所以无从执行,于是网上搜索了一下,自己编辑了一个linuxrc脚本,属性改为可执行,内容如下: #!/bin/sh echo "mount /etc as ramfs" /bin/mount -n -t ramfs ramfs /etc /bin/cp -a /mnt/etc/* /etc echo "re-create the /etc/mtab entries" /bin/mount -f -t cramfs -o remount,ro /dev/mtdblock/3 Vfs Cannot Open Root Device Centos

add a comment| 1 Answer 1 active oldest votes up vote 0 down vote Root-NFS: Unable to get nfsd port number from server, using default Your NFS server does not run I have been using NAND boot with NFS, and I am moving to getting the filesystem in with the kernel. The site will show you which kernel drivers you need to select for your system. have a peek at these guys Tools Insider University Program Groups Corporate Citizenship TI University Program Russian E2E (сообщество E2E) Japanese E2E (日本語コミュニティ) Learn E2E Launch Your Design Motor Drive & Control Videos More Cancel Linux Linux

Make the necessary changes, like cleaning the kernel command line a little more and/or adding the missing modules. Please Append A Correct Root= Boot Option Redhat Having an Issue With Posting ? Read more Top Home Terms of use Contact me About Copyright @ Dedoimedo.com 2006-2016; all rights reserved RopenYuan的专栏 目录视图 摘要视图 订阅 移动信息安全的漏洞和逆向原理 程序员11月书讯,评论得书啦 Get IT技能知识库,50个领域一键直达 linux_内核移植方法及错误 标签:

For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration.

  • Is there a step I am missing so that the kernel can mount the filesystem?
  • Looking up port of RPC 100003/2 on 192.168.1.100 rpcbind: server 192.168.1.100 not responding, timed out Root-NFS: Unable to get nfsd port number from server, using default Looking up port of RPC
  • Let's see them here: VFS: Cannot open root device "LABEL=/" or 00:00 Please append a correct "root=" boot option Kernel panic: VFS: Unable to mount root fs on 00:00 Or the

done
zImage magic = 0x016f2818
Setup linux parameters at 0x30000100
linux command line is: "noinitrd root=/dev/mtdblock3 init=/linuxrc console=ttySAC0,115200"
MACH_TYPE = 193
NOW, Booting Linux......
Uncompressing Linux.................................................................................................. However, during the Kdump kernel startup, a panic message appears on the console. Content on this site may contain or be subject to specific guidelines or limitations on use. Vfs Cannot Open Root Device Uuid Reply Cancel Cancel Reply Suggest as Answer Use rich formatting Mastermind 41690 points Bernie Thompson TI Apr 1, 2011 1:21 AM In reply to Bryan Evenson: It looks like this is

For details and our forum data attribution, retention and privacy policy, see here current community blog chat Super User Meta Super User your communities Sign up or log in to Kernel panic not syncing,VFS Unable to mount root fs on unknown-block(0,0) 原因分析:出现这种情况一般有两种情况:没有文件系统或boot options参数不正确,如我的系统文件系统为cramfs格式,存放文件系统的分区为第三个分区,启动参数为: "noinitrd root=/dev/mtdblock2 ro init=/linuxrc console=ttySAC0,115200 rootfstype=cramfs mem=64M" 其中文件系统使用busybox-1.10.1制作 重新编译即可。 3. 系统启动后出现如下错误: Kernel panic -not syncing:VFS:Unable to mount Choose your default shell (ash) ?---> ? ? ? 2、如果是这样配置的话,虽然可以生成ash,但不能生成sh: ? │ │ ? ? ? http://rinfix.com/cannot-open/vfs-cannot-open-root-device-null-or-unknown-block8-1.html Was it legal to rant against trick or treating via loudspeaker during halloween?

Adv Reply March 18th, 2013 #3 MGertz View Profile View Forum Posts Private Message First Cup of Ubuntu Join Date Mar 2013 Beans 2 Re: Loading Ubuntu Server over TFTP, Blogs Recent Entries Best Entries Best Blogs Blog List Search Blogs Home Forums HCL Reviews Tutorials Articles Register Search Search Forums Advanced Search Search Tags Search LQ Wiki Search Tutorials/Articles Search Click Here to receive this Complete Guide absolutely free. You will notice I am not giving you any specific instructions, because every system is different.

This is not because kernels are inconsistent with each other, but because of the drivers used: older drivers use the hda syntax, newer sda. thank you mcha View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by mcha Tags initramfs, initrd, mount, nfs, rootfs Thread Tools Show User contributions on this site are licensed under the Creative Commons Attribution Share Alike 4.0 International License. Do you want to help me take early retirement?

When using initramfs, the filesystem is running /sbin/init for it's init with no changes from what is used when it is an NFS. How can I claim compensation? Main Menu LQ Calendar LQ Rules LQ Sitemap Site FAQ View New Posts View Latest Posts Zero Reply Threads LQ Wiki Most Wanted Jeremy's Blog Report LQ Bug Syndicate Latest Check if you have built in (and not as a module) support for the bus / protocol that your harddisk controller uses.

For example, you may have special hardware that needs special drivers. One, the KDUMP_COMMANDLINE directive, as specified in the /etc/sysconfig/kdump configuration file.