<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>Hi Dietmar, hi Alexandre,<br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
Second, why do you think 'writethrough' is required for DRBD?<br>
</blockquote></div><br></div><div class="gmail_extra">VM drives are often get corrupted when using any mode with write cache enabled. Only directsync and writethrough do not produce the issue. Doesn't matter if DRBD in master-master or master-slave mode.<br></div><div class="gmail_extra">Lars Ellenberg explains <a href="http://www.gossamer-threads.com/lists/drbd/users/25946#25946">here</a> why this happens.<br><br></div><div class="gmail_extra">Best regards,<br>Stanislav<br></div></div>