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Re: xfsrestore Does Only Only Partial Restore

To: Bill Kendall <wkendall@xxxxxxx>
Subject: Re: xfsrestore Does Only Only Partial Restore
From: Gim Leong Chin <chingimleong@xxxxxxxxxxxx>
Date: Tue, 30 Aug 2011 00:36:21 +0800 (SGT)
Cc: xfs@xxxxxxxxxxx
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Hi Bill,

Right now the log file is already over 500 MB and growing.  Even after 
compression I do not think I can mail it as an attachment.

Is there any other way that I can send you the log files?


GL

--- On Mon, 29/8/11, Bill Kendall <wkendall@xxxxxxx> wrote:

> From: Bill Kendall <wkendall@xxxxxxx>
> Subject: Re: xfsrestore Does Only Only Partial Restore
> To: "Gim Leong Chin" <chingimleong@xxxxxxxxxxxx>
> Cc: xfs@xxxxxxxxxxx
> Date: Monday, 29 August, 2011, 10:11 PM
> Gim Leong Chin wrote:
> > Hi,
> > 
> > This is the very first time I tried doing a xfsrestore
> of a back up and I hit some serious trouble.
> > 
> > I had openSUSE 11.1 (kernel 2.6.27) on my Acer
> notebook.  I did a xfsdump of /home to a WD My Passport
> external USB hard drive with XFS on it.
> > 
> > I installed openSUSE 11.4 (kernel 2.6.37), then tried
> to do xfsrestore from the WD USB drive.  The dump file
> is 121 GB.
> > 
> > I tried two times on two different days, but each time
> the xfsrestore would stop writing at the exact same point,
> 49 GB and say success at the end.
> > 
> > I then copied the dump file to one hard drive on my
> desk top, and did a dump to another hard drive, to
> /tmp/mnt3.  I get back identical messages:
> > 
> 
> ...
> 
> > 9>xfsrestore: attempt to read 1008286921 bytes
> failed: end of recorded data
> 
> xfsdump breaks a file's data into "extents" that are a max
> size of 16 MB.
> The fact that this is trying to read almost 1 GB here
> indicates that
> the extend header is corrupt.
> 
> ...
> 
> >   xfsrestore: content.c:7510:
> restore_extent_group: Assertion `ehdr.eh_type == 4' failed.
> 
> As Dave said, this also indicates a corrupt extent header.
> 
> I'd recommend adding "-v 5" to your xfsrestore command line
> and redirecting the
> (very verbose) output to a file, and send that compressed
> output to me or the
> list. It'd be best to do this with more than one of your
> dumps so we can see
> if there's a pattern to where the corruption occurs.
> 
> Bill
> 
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