Re: detection/correction of corruption with raid6

[Redeeman <redeeman@metanurb.dk>]

On Fri, 2008-12-05 at 16:02 -0500, Justin Piszcz wrote:
> 
> On Fri, 5 Dec 2008, Redeeman wrote:
> 
> > Hello.
> >
> > I was looking at the PDFs linked to from the wiki, and found this:
> > http://kernel.org/pub/linux/kernel/people/hpa/raid6.pdf
> >
> > More specifically, section 4, starting on page 8.
> >
> > Am I understanding this correctly, in that with raid6, linux is capable
> > of detecting if the content on 1 disk is corrupted, and reconstruct it
> > from the remaining disks?
> 
> I ran md/raid6 for awhile, do you mean remap the bad sector on the fly? 
> Linux/md raid does not do this afaik.

No, i mean, if one disk does silent corruption

> 
> But it can recover from a single or double disk failure, I have had both 
> happen.
> 
> Justin.
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