Re: How does btrfs behave on checksum mismatch?

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On Sun, Oct 28, 2012 at 02:23:51PM +0100, Martin Steigerwald wrote:
> Am Sonntag, 28. Oktober 2012 schrieb Ronnie Collinson:
> > In a raid1 situation, it will also rewrite the effected data, on the
> > drive that failed the checksum
> 
> Will it do so without an explicit scrub?

   If a failed checksum is detected, yes.

   If there's a bad block, and the FS happens to read the good copy
first, it won't fix it, because it hasn't tried reading the bad copy
yet.

   Hugo.

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