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

Luca Berra bluca at comedia.it
Tue Aug 21 06:52:52 UTC 2007

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?


Luca Berra -- bluca at comedia.it
        Communication Media & Services S.r.l.
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