linux-ext4 - Re: ext over RAID-[56]?

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Message-ID: <AANLkTin7fNhmJuX-M8U+bVA_5ymx16MN5zJ8axC1k1Q1@mail.gmail.com>
Date:	Sun, 17 Oct 2010 12:38:49 +0200
From:	"Amir G." <amir73il@...rs.sourceforge.net>
To:	Daniel Taylor <Daniel.Taylor@....com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: ext over RAID-[56]?

On Sun, Oct 17, 2010 at 2:16 AM, Daniel Taylor <Daniel.Taylor@....com> wrote:
> One of the program managers here asked me a question that I couldn't answer:
>
> with ext[34] over a RAID-[56] volume, what protection against data
> corruption
> and loss of existing data does the file system provide for the case of an
> incomplete update of the RAID "stripe"?
>
> I know that anyone with any usable brain cells has their data server on a
> nice
> UPS, but not all customers are so equipped, and he's concerned about
> corruption
> during a power failure (loss of unwritten data is OK).
>
> I can't see any configuration options that would help but I could easily be
> missing something.  Any ideas?
>

I don't think you are missing something. check out this article:
http://lwn.net/Articles/349970/
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