Joe Warren-Meeks wrote:
On 28 Apr 2006, at 12:32, Abi Chirayil wrote:
Joe Warren-Meeks wrote:
On 27 Apr 2006, at 14:43, Joe Warren-Meeks wrote:
Hey guys,
I've installed xen 3 and xen-tools on my ubuntu server and all seems
well, until I try to start a client domain. (running on Linux
xenserver 2.6.12.6-xen #1 SMP Wed Feb 1 21:23:17 UTC 2006 i686
GNU/Linux)
Bit of a follow-up. If I try to start the DomU, it initally errors as
so:
root@xenserver:/etc/xen# xm create -c squid1.cfg
Using config file "squid1.cfg".
Error: Device 2049 (vbd) could not be connected. Backend device not
found.
and then shows up as paused in 'xm list'
If I then attach a console to it, then unpause I see the following
error at the end:
VFS: Cannot open root device "sda1" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-
block(0,0)
I've tried adding /dev/ nodes using MAKEDEV in both the Dom0 and DomU
and tried changing sda to hda, to no avail.
Anyone got a pointer to where I can start looking?
As a futher follow up, if I use xen-create-image to create a new domU,
this completes fine and then starts the image successfully! I can then
go and start all the other images and all is fine.
Once I've halted them all and rebooted the server itself, it all stops
working again.
Anyone got any pointers? This is getting quite frustrating.
I'm getting exactly the same error (also using Ubuntu). I just tried
mounting and unmounting the one of the images and that seems to get
everything working - till the next reboot.
mount -o loop /vserver/images/vmNMS.img /vserver/vm_base/
umount /vserver/vm_base/
Any idea why this happens? I've also been pulling my hair out the past
couple of days.
Think I've fixed it.
I read xen-create-image to see why it seemed to work if I used that.
Just by an aside I noticed that there is an option of use-ide
So, I've set "use-ide = 1" in /etc/xen-tools/xen-tools.conf and
recreated my images and it seems to work now.
I don't have these files and options under FC5, are you under Debian?
Is there another place where I can specify the use-ide=1 option as I
have the exact same problem that this solution seems to solve.
Regards,
I figure that an IDE server has problems trying to run a SCSI domU
I'm creating a bunch of domUs now and rebooting to see if they all
start ok. (I also had to up my loopback devices as indicated in
another post)
Give it a shot and report back.
-- joe.
Joe Warren-Meeks T: +44 (0) 208 962 0007
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