linux-ext4 - Re: [Q] ext3 mkfs: zeroing journal blocks

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Message-ID: <4A087202.4010601@redhat.com>
Date:	Mon, 11 May 2009 13:44:18 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Andreas Dilger <adilger@....com>
CC:	Alexander Shishkin <alexander.shishckin@...il.com>,
	linux-ext4@...r.kernel.org
Subject: Re: [Q] ext3 mkfs: zeroing journal blocks

Andreas Dilger wrote:

> The reason that the journal is zeroed is because there is some chance
> that old (valid at the time) transaction headers and commit blocks might
> be in the journal and could accidentally be "recovered" and cause bad
> corruption of the filesystem.

But I guess the question is, why isn't a normal internal log zeroed?

If I'm reading it right only external logs get this treatment, and I
think that's what generated the original question from Alexander.

-Eric
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