From: Daniel Jacobowitz <dan@debian.org>
To: Neil Brown <neilb@cse.unsw.edu.au>
Cc: linux-kernel@vger.kernel.org
Subject: Re: RAID arrays not reconstructing in 2.6
Date: Mon, 2 Feb 2004 09:34:39 -0500 [thread overview]
Message-ID: <20040202143439.GA22241@nevyn.them.org> (raw)
In-Reply-To: <16413.54841.104599.928032@notabene.cse.unsw.edu.au>
On Mon, Feb 02, 2004 at 03:46:49PM +1100, Neil Brown wrote:
> On Sunday February 1, dan@debian.org wrote:
> > I saw this a couple of weeks ago in a 2.6.0-test kernel, and today in
> > 2.6.2-rc3. When I have to hit the hard reset button on my desktop, whose
> > root filesystem is RAID5 on /dev/md0, it comes back up cleanly - no
> > reconstruction.
>
> Cool, isn't it!
>
> >
> > Have we gotten a whole lot more enthusiastic about marking superblocks clean
> > lately, or should I be worried? Obviously this always used to trigger
> > reconstruction, until recently.
>
> Yes. Lots more enthusiastic.
> If there is no write activity for 20msec, we mark the superblock clean
> and write it out, and are careful to write out a dirty superblock
> before allowing another write to complete.
Wow, thanks! That's really awesome, considering how long
reconstruction takes this system (about an hour of completely useless
otherwise).
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
prev parent reply other threads:[~2004-02-02 14:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-01 17:15 RAID arrays not reconstructing in 2.6 Daniel Jacobowitz
2004-02-02 4:46 ` Neil Brown
2004-02-02 14:34 ` Daniel Jacobowitz [this message]
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