linux-ext4 - Feature request: e2fsck -z

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Date:	Tue, 09 Aug 2011 12:52:20 -0500
From:	"H. Peter Anvin" <hpa@...or.com>
To:	linux-ext4@...r.kernel.org
Subject: Feature request: e2fsck -z

Hi all,

This is something I've wanted to see for a very long time, and it
finally occurred to me that perhaps I should say something about it!

It would be a very nice thing to have a flag to e2fsck, presumably -z,
to zero out any unused data blocks, inodes and so on.  The goal is to
minimize the amount of space required after compressing a virtual disk
image or similar, and to make sure any non-data isn't lying around.

	-hpa
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