linux-ext4 - Re: fsck performance.

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Message-ID: <20110224090232.GG16661@bitwizard.nl>
Date:	Thu, 24 Feb 2011 10:02:32 +0100
From:	Rogier Wolff <R.E.Wolff@...Wizard.nl>
To:	Amir Goldstein <amir73il@...il.com>
Cc:	Rogier Wolff <R.E.Wolff@...wizard.nl>,
	Andreas Dilger <adilger@...ger.ca>, linux-ext4@...r.kernel.org
Subject: Re: fsck performance.

On Thu, Feb 24, 2011 at 10:59:23AM +0200, Amir Goldstein wrote:

> That tool is e2image -r, which creates a sparse file image of your
> fs (only metadata is written, the rest is holes), so you need to be
> careful when copying/transferring it to another machine to do it
> wisely (i.e. bzip or dd directly to a new HDD) Not sure what you
> will do if fsck fixes errors on that image...  Mostly (if it didn't
> clone multiply claimed blocks for example), you would be able to
> write the fixed image back onto your original fs, but that would be
> risky.

I can then run the fsck tests on the image. I expect fsck to find
errors: I'm using the filesystem when I'm making that image.... It 
won't be consistent. 


	Roger. 


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