Re: RAID arrays not reconstructing in 2.6

[Daniel Jacobowitz]

On Mon, Feb 02, 2004 at 03:46:49PM +1100, Neil Brown wrote:
> On Sunday February 1, dan@xxxxxxxxxx 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
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