Re: [Xen-users] VM getting hang

["Fajar A. Nugraha" <fajar@xxxxxxxxx>]

On Fri, Jan 23, 2009 at 5:49 PM, gopikrishnan <gopikrishnan@xxxxxxxxxxxx> wrote:
>  We are using CentOS release 5.2 (DOM 0) and Xen version 3.1.2-92.1.18.el5.
> All the VPS (DOM U) are various distros of LINUX.
>
> And we are using an LVM setup in this DOM 0.
>
> xm top
> =========
> xentop - 21:53:55   Xen 3.1.2-92.1.18.el5
> 36 domains: 1 running, 35 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
> Mem: 8386596k total, 6288484k used, 2098112k free    CPUs: 4 @ 2660MHz
> ============

Actually what I need from xm top is what kind of CPU load dom0 and
domUs are using, which ones uses most CPU. So cutting the output like
you did makes it pretty much useless. Never mind though, I think I
already found the problem.

>
> And unfortunately, we need to reboot the DOM 0 today and at that time, we got
> the following error message:
> ===========
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> ============
>

Seems like my wild guess was right : It WAS disk problem :D
The solution is simple : fix your disk. I think sd 0:0:0:0 is sda (e.g
the first disk if its internal, the first LUN if its external).

If you're using internal disks with HW raid controller, I think you
can see which disks are broken from BIOS, or by looking for disks
whose LED is on.

Regards

Fajar

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