Re: [linux-lvm] Flexible storga: LVM setup on top of mdadm sets. Good idea or not?

[Luca Berra <bluca comedia it>]

On Mon, Aug 20, 2007 at 08:33:26PM -0400, Stuart D. Gathman wrote:
> On Mon, 23 Jul 2007, Luca Berra wrote:
>
> > On Sun, Jul 22, 2007 at 02:57:33PM -0400, Stuart D. Gathman wrote:
> > >The main drawback to md raid1 is that it always resynchronizes
> > >the *entire* partition when a disk goes offline temporarily.  I also
>
> > False. md uses bitmaps to avoid this.
>
> Ok, I just tested this with Centos-5.0, kernel-2.6.18-8.1.8.el5.
> I shutdown with md1 50% resynced, and when it boots, it starts over
> at the beginning.  Maybe we are talking about different things, but
> it is a major annoyance that it restarts the sync from the beginning
> if it misses just one update (e.g. unexpected power failure or reboot).
did you add the bitmap to your md array?

L.

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Luca Berra -- bluca comedia it
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