Date: Wed, 14 Jan 2004 20:07:02 +0100
From: Jakob Oestergaard <jakob@unthought.net>
To: Scott Long <scott_long@adaptec.com>, linux-kernel@vger.kernel.org
Subject: Re: Proposed enhancements to MD
Message-ID: <20040114190701.GD22216@unthought.net>
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	Scott Long <scott_long@adaptec.com>, linux-kernel@vger.kernel.org
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On Tue, Jan 13, 2004 at 12:10:58PM -0800, Mike Fedyk wrote:
> On Tue, Jan 13, 2004 at 05:26:36PM +0100, Jakob Oestergaard wrote:
> > The RAID conversion/resize code for userspace exists already, and it
> 
> That's news to me!
> 
> Where is the project that does this?

http://unthought.net/raidreconf/index.shtml

I know of one bug in it which will thoroughly smash user data beyond
recognition - it happens when you resize RAID-5 arrays on disks that are
not of equal size.  Should be easy to fix, if one tried  :)

If you want it in the kernel doing hot-resizing, you probably want to
add some sort of 'progress log' so that one can resume the
reconfiguration after a reboot - that should be doable, just isn't done
yet.

Right now it's entirely a user-space tool and it is not integrated with
the MD code to make it do hot-reconfiguration - integrating it with DM
and MD would make it truely useful.


 / jakob

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