Thank you Junjiro.

My sincerest thanks. Making me go through that step allowed me to see 
this was in fact a mistake on my part. Aufs was 100% correct.

The problem was /tmp was not mounted as tmpfs like it was supposed to. 
Since it wasn't mounted, it was in fact using the root partition which 
just so happens to be sda1. And that was also mounted at /usbstick/root. 
Hence, an overlap (although in a not so obvious way).

Sorry. Guess I need to get more sleep.

I'm hoping aufs will prove more stable than unionfs. I've never made it 
more than about 10 minutes with unionfs before crashing. 

Best regards,

Chris

[EMAIL PROTECTED] wrote:
> Hello Chris,
>
> Chris Ziomkowski:
>   
>> I am trying to test aufs. I have given up on using unionfs, as it keeps 
>> panicing my kernel. Unfortunately, I can't get aufs to run at all.
>>     
>       :::
>   
>> root:/# mount -t aufs none /tmp/autest -o dirs=/tmp/aubr1/:/usbstick/root=ro
>>     
>       :::
>   
>> aufs test_add:412:mount[10624]: /usbstick/root is overlapped
>>
>> Of course, this is blatantly untrue. Obviously /usbstick does not 
>> overlap with anything as I understand the meaning of the term. Has 
>>     
>
> If you had not mount /usbstick/root, aufs worked expectedly. But your
> /proc/mounts shows that /dev/sda1 is mounted at /usbstick/root. That is
> very strange.
> I don't think you mounted /usbstick/root after the failure of aufs mount.
>
> Will you try these steps and send me the debug log?
>
> # mount -o ... /dev/sda1 /usbstick/root
> # echo 8 > /proc/sys/kernel/printk
> # (set up syslogd to receive debug log and restart it)
> # echo 1 > /sys/fs/aufs/debug
> # mount -t aufs -o dirs=/tmp/aubr1:/usbstick/root none /tmp/autest
> # echo 0 > /sys/fs/aufs/debug
>
>
> Junjiro R. Okajima
>
>   


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