linux-ext4 - Question of online defrag, thanks

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Message-ID: <2CE44BD3DBCF9541909CCB42F11CA3921C78E294@sfo1exc-mbxp08.nbttech.com>
Date:	Mon, 28 Oct 2013 17:13:15 +0000
From:	Ming Lei <Ming.Lei@...erbed.com>
To:	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
CC:	Peng Chen <Peng.Chen@...erbed.com>
Subject: Question of online defrag, thanks

Hi,

I am using e4defrag to defrag running ext4 online.
During running e4defrag, I am writing/reading data on file system.
Is it safe to use e4defrag? I mean if power failure happens, is there any possibility of data loss or defragging file corruption?
If there is possibility of defragging file corruption after power failure, can fsck fix it?

Thank you very much.
Peng

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