perfSONAR User Q&A and Other Discussion

[Jason Zurawski <>]

Hi Joshua;

Were there any messages preceding the 'RAMDISK' line below?

Could you try booting into one of the other kernels on the system (doesn't 
matter if its web100 for now)?  We have not had any other reports of this 
nature, and that error could mean just about anything.  

If you are able to get in to the system via a different kernel, you may want 
to verify things like if the disk has run out of space (in particular, the 
/boot partition).  If you can't get in via a different kernel, let us know 
and we see what else we can try.  

Thanks;

-jason

On Apr 11, 2014, at 1:20 PM, Joshua Luke 
<>
 wrote:

> Hello,
> 
> One of our perfSONAR nodes is not coming back up due to a kernel panic (see 
> attached emails for full error message) after an OpenSSL update and reboot. 
> The issue was not fixed on subsequent reboots.
> 
> If this issue has been encountered by anyone previously, or if anyone has 
> any experience with this, your thoughts or advice would be appreciated.
> 
> In the attached emails below is all the details that I have personally, but 
> if you need more, Shawn, Sarah, or Dave (all CC'd) should be able to 
> provide you with them.
> 
> Thank you,
> Joshua Luke 
> 
> 
> 
> ---------- Forwarded message ----------
> From: Joshua Luke 
> <>
> Date: Fri, Apr 11, 2014 at 11:23 AM
> Subject: Re: IU perfSONAR bandwidth node is down?
> To: David Lesny 
> <>
> Cc: Shawn McKee 
> <>,
>  Sarah Williams 
> <>
> 
> 
> Dave, 
> 
> iut2-net2 is experiencing a kernel panic (full error text at the end of 
> this email). I'm not sure what needs to be done to remedy this. I was able 
> to boot into the other options on the GRUB menu.
> 
> Error message:
> 
> RAMDISK: incomplete write (3107 != 32768)
> write error
> Kernel panic - not syncing: VFS: Unable to mount root fs on 
> unkown-block(0,0)
> Pid: 1, comm: swapper Not tainted 2.6.32-431.11.2.e16.aufs.web100.x86_64 #1
> Call Trace: [I don't think you need this, so I'm omitting it]
> 
> - Josh
> 
> 
> On Fri, Apr 11, 2014 at 8:57 AM, David Lesny 
> <>
>  wrote:
> Joshua,
> 
> iut2-net2.iu.edu seems to have have not booted after the update of openssl 
> (and a reboot)
> 
> Could you have a look at it today and see why it did not return to service.
> 
> thanks, dave
> 
> 
> 
> 
> On 4/11/2014 7:44 AM, Shawn McKee wrote:
>> Hi  Sarah,  Dave,  
>> 
>> The  IU perfSONAR-PS bandwidth  node seems  to  be down?
>> 
>> Can  someone check  it?  Thanks,
>> 
>> Shawn