From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Tue, 9 Oct 2001 20:30:31 +0100
Subject: Re: [linux-lvm] rc4 can't take snaphots of 0.9.1_beta7 lvs
Message-ID: <20011009203031.B1034@btconnect.com>
References: <387040000.1002641567@tiny> <20011009165801.B851@btconnect.com> <407510000.1002645036@tiny>
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In-Reply-To: <407510000.1002645036@tiny>; from mason@suse.com on Tue, Oct 09, 2001 at 12:30:36PM -0400
From: Joe Thornber <thornber@btconnect.com>
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On Tue, Oct 09, 2001 at 12:30:36PM -0400, Chris Mason wrote:
> 
> 
> On Tuesday, October 09, 2001 04:58:01 PM +0100 Joe Thornber
> <thornber@btconnect.com> wrote:
> > 
> > Some of the betas misaligned the logical volumes.  If the volumes
> > aren't page aligned the snapshot code (which uses kiovecs) cannot
> > work.  You have this problem.  Fixing it isn't easy; you need to
> > shuffle your extents up or down by the appropriate amount.  No one has
> > written a program to do this as of yet.  Sorry.
> > 
> 
> Well, it worked in beta7

did it ?  It may not have segfaulted, but did you check the data
really carefully ?  After all it took a while for anyone to realise the
problem existed.

- Joe