Re: csum questions

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On Fri, Sep 27, 2013 at 04:22:16PM +0200, Tom Gundersen wrote:
> Hi guys,
> 
> I have some questions about btrfs' handling of invalid csums.
> 
> For the sake of argument I'm assuming no raid or anything like that
> (so only one copy exists of every file).
> 
> When I try to access a file whose csum does not match, btrfs logs an
> error and refuses access to the file. I have two questions about this:
> 
> 1) What happens to the file. Will btrfs just leave it alone, or will
> it be deleted from disk (I seem to remember reading this somewhere,
> just want to confirm)?

   It's left there.

> 2) How may I tell btrfs to ignore all csums and just assume they are
> all correct? The reason for wanting this is in case the csum is
> garbled and the file is intact, or the csum is correct and the file is
> only partially garbled, but may still contain useful data.

   You can't, right now. There's discussion on IRC about this very
point right now. :)

   Hugo.

-- 
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
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