Re: Files with zeros, crash, questions

To:	Joe Krahn <jkrahn@xxxxxxxxx>
Subject:	Re: Files with zeros, crash, questions
From:	Andi Kleen <ak@xxxxxxx>
Date:	Thu, 31 May 2001 17:29:23 +0200
Cc:	linux-xfs@xxxxxxxxxxx
In-reply-to:	<3B15A7E0.BF08E07A@xxxxxxxxx>; from jkrahn@xxxxxxxxx on Wed, May 30, 2001 at 10:09:36PM -0400
References:	<3B15A7E0.BF08E07A@xxxxxxxxx>
Sender:	owner-linux-xfs@xxxxxxxxxxx
User-agent:	Mutt/1.2.5i

On Wed, May 30, 2001 at 10:09:36PM -0400, Joe Krahn wrote:
> A few questions:
> Why do I get zero-filled files on a crash, but I never see
> them on an SGI crash? Also, I never see it with ext2, which
> probably leaves the previous contents for unsynced files
> insteds of zeros. It would be nice if unsynced XFS would
> leave the previous contents for unsynced files, and it would
> also be good to store a list of suspect files on reboot.

XFS/Irix supports "unwritten extents", XFS/Linux doesn't and the 
not yet flushed but extents turn into zeroed holes after crash. See the
"might have found a bug" thread some time ago for more information.

-Andi

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