Public bug reported:
This is the same machine as I just reported bug 1618771 against. I am
raising this bug by hand to report the kernel panic that I was talking
about in 1618771.
A virtual machine running on a Windows Server 2012R2 Hyper-V system
rebooted as part of an automated upgrade last night. It seems to have
just installed the new 3.19.0-68-generic kernel. The system failed to
boot and instead kernel paniced.
As part of investigating the problem we tried booting the previously
installed kernel (66 I think) and could bring up the system OK. It asked
to perform a disk check on / and /boot as it came up, which seemed to go
fine. Once we were running a `df -h` showed that /boot was 100% full
with no space left at all. To improve the system an `apt-get autoremove`
was run which uninstalled a bunch of older kernels, freeing just over
100MB of space from /boot. Power cycling the system allowed us to boot
successfully under the new 3.19.0-68 kernel.
We have an image of the failed boot message & I will type out a few of
the lines here:
VFS: Cannot open root device "mapper/warden--vg-root" or unknown-block(0,0):
error -6
Please append a correct "root=" boot option; here are the available partitions:
0b00 1048575 sr0 driver: sr
Kernel panic - not syncing: VFS: Unable to mount root fs unknown-block(0,0)
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-68-generic #76~14.04.1-Ubuntu
Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS
090006 05/23/2012
** Affects: linux-lts-vivid (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Image of the end of the kernel panic output"
https://bugs.launchpad.net/bugs/1618778/+attachment/4731414/+files/kernel-panic-on-boot.png
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https://bugs.launchpad.net/bugs/1618778
Title:
Kernel Panic from 3.19.0-68-generic VFS: Unable to mount root fs on
unknown-block(0,0)
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