Databases
StackOverflow2013
Postsdbo
POKernel Panic - not syncing: VFS: Unable to mount root fs on unknown-bloc(8,2)
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POKernel Panic - not syncing: VFS: Unable to mount root fs on unknown-bloc(8,2)
    primarykey
    data
    text
    <p>I am a spanish speaker so excuse me for my bad english.</p> <p>I am learning how to compile slackware kernel, so I have downloaded linux-3.2.7.tar.bz2 from <a href="http://www.kernel.org" rel="nofollow">http://www.kernel.org</a></p> <p>Conditions:</p> <ul> <li>Slackware installed on a vmware virtual machine.</li> <li>Host o.s windows 7.</li> <li>Slackware root filesystem: ext4</li> <li>Slackware old kernel: 2.6.37.6</li> </ul> <p>Basically I have followed the following steps:</p> <pre><code>#cd /usr/src #tar jvxf linux-3.2.2.tar.bz2 #mv /usr/src/linux /usr/src/linux.old #ln -s /usr/src/linux-3.2.2 /usr/src/linux #cd linux-3.2.2 #make mrproper #cp /usr/src/linux-2.6.37.6/.config /usr/src/linux-3.2.2/.config #make menuconfig </code></pre> <p>Load an alternate configuration file: .config INCLUDED (OPTION Y):</p> <p>ATA/ATAPI/MFM/RLL support (DEPRECATED) (at Device drivers)</p> <ul> <li>SCSI generic support (at Device drivers)</li> <li>second extended support (at filesystems)</li> <li>ext3 journaling (all)</li> <li>ext4 (all)</li> <li>ext4 (at filesystems)</li> <li>JBD (ext4) debuggin support</li> <li>JBD2 (ext4) debugging support</li> <li>ReiserFS support</li> <li>XFS filesystem support</li> <li><p>"compile kernel with debug info" (at kernel hacking)</p> <h1>make dep</h1> <h1>make clean</h1> <h1>make bzImage</h1> <h1>make modules</h1> <h1>make modules_install</h1> <h1>mv /boot/System.map /boot/System.map.old</h1> <h1>cp /usr/src/linux/System.map /boot/System.map-3.2.2</h1> <h1>ln -s /boot/System.map-3.2.2 /boot/System.map</h1> <h1>mv /boot/vmlinuz /boot/vmlinuz.old</h1> <h1>cp /usr/src/linux/arch/i386/boot/bzImage /boot/vmlinuz-3.2.2</h1> <h1>ln -s /boot/vmlinuz-3.2.2 /boot/vmlinuz</h1> <h1>nano -w /etc/lilo.conf</h1></li> </ul> <p>ADDED THE FOLLOWING LINES:</p> <pre><code>image=/boot/vmlinuz.old label = oldSlack root = /dev/sda2 read-only #lilo #lilo -q #shutdown -r now </code></pre> <p>When kernel 3.2.2 is booting, it stops showing the following:</p> <pre><code>VFS: Cannot open root device "802" or unknown-block(8,2) Please append a correct "root=" boot option Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-bloc(8,2) </code></pre> <p>I hate this message because I have recompiled the kernel many times, and after hours of compilation I always get this message. :(</p> <p>Can anyone help me to understand what I am doing bad or why is that error? </p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USadrian4aes
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COI think this question might be better suited and more likely to be answered cotrectly on SuperUser (or maybe ServerFault).
      singulars
      1. POKernel Panic - not syncing: VFS: Unable to mount root fs on unknown-bloc(8,2)
      1. USAlex
    2. COI would try using /dev/sda1 instead of /dev/sda2. You're virtual machine is a whole computer: you likely have just one partition there, so the kernel is on /dev/sda1: the first primary partition of the drive. The message basically tells you there's no such thing as /dev/sda2.
      singulars
      1. POKernel Panic - not syncing: VFS: Unable to mount root fs on unknown-bloc(8,2)
      1. USPiotr Kalinowski
    3. COWhen installing slackware in vmware I made 2 partitions using fdisk: sda1 for swapping, sda2 for kernel.
      singulars
      1. POKernel Panic - not syncing: VFS: Unable to mount root fs on unknown-bloc(8,2)
      1. USadrian4aes
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload