Data corruption over NFS in -current

Ivan Voras ivoras at
Mon Jan 16 16:35:49 UTC 2012

On 13/01/2012 15:37, Martin Cracauer wrote:
> More findings.
> Reminder, with the original report I found:
> - files for no reason changing ownership and group to
>    root/<owngroupname>
> - data corruption as in inserting binary junk obviously from ports
> - data corruption as in malformed ascii text that might be a bug I
>    have in my code that is only exposed in FreeBSD

> I re-ran with newfs (reboot) which worked (all three problems absent).
> I then started building ports/land/gcc47 at the same time as I
> re-started my crazy script and it too only a few seconds for an
> unexpected ownership to root to occur.

Two more things to check:

1) Are you using tmpfs? Could you try without it?

2) Are you really sure your hardware is ok? If everything works fine 
after a reboot, it might mean that there is a memory corruption and you 
don't use that specific memory until some time after the reboot. Try 
running memtest86.

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