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ultrakd001
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PostPosted: Thu Jul 17, 2014 12:13 pm    Post subject: Kernel Panic on first boot Reply with quote

I finally managed to finish the installation process of Gentoo but on my first boot I got a kernel panic it said:
Kernel Panic not syncing: VFS Unable to mount root fs on unknown-block(0,0) .It obviously can't mount the FS.
I suppose that I configured something wrong but what is it?
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Adel Ahmed
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PostPosted: Thu Jul 17, 2014 1:06 pm    Post subject: Reply with quote

hmm this will most probably be either an incorrect kernel config or an incorrect bootloader config

when this panic occurs, can you see your hard disk's partition information? could you post that output as well

Please post your bootloader configuration file

what is your rootfs type(file system) are you using LVM/software raid anything of that sort?
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DONAHUE
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PostPosted: Thu Jul 17, 2014 5:00 pm    Post subject: Reply with quote

boot the livecd/usb, mount the gentoo partitions, run
Code:
wgetpaste /mnt/gentoo/usr/src/linux/.config
lspci -k | wgetpaste
post the url's returned
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ultrakd001
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PostPosted: Fri Jul 18, 2014 2:35 pm    Post subject: Reply with quote

I figured it out the problem was in fstab.
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NeddySeagoon
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PostPosted: Fri Jul 18, 2014 7:33 pm    Post subject: Reply with quote

ultrakd001,

Don't be shy - share your learning experience so that others reading this thread can benefit.

Tell the problem and the solution.
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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ultrakd001
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PostPosted: Sat Jul 19, 2014 5:46 am    Post subject: Reply with quote

I am sorry I didn't share it was because I didn't have time so I posted just that.
The problem seemed to be as I said in the fstab file. In the line about of the rootfs I had the dump field set at 1 and the fsck field at 2.
I changed the fifth field to 0 and it worked
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NeddySeagoon
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PostPosted: Sat Jul 19, 2014 8:21 am    Post subject: Reply with quote

ultrakd001,

Thank you for contributing to Gentoo.

I think you did something else too. The error
Code:
VFS Unable to mount root fs on unknown-block(0,0)
is generated before the root filesystem is mounted.
/etc/fstab is on the root filesystem, therefore it cannot be read until the root filesystem is mounted.

The unknown-block(0,0) bit is the kernel telling that it cannot even see your hard drive. This implies a piece missing from your kernel or initrd.
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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ultrakd001
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PostPosted: Sat Jul 19, 2014 9:07 am    Post subject: Reply with quote

That is true but when I changed I didn't get this message any more
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