From mboxrd@z Thu Jan 1 00:00:00 1970 From: Francis Moreau Subject: How does md(adm) work with fake-raid ? Date: Thu, 18 Jul 2013 22:37:32 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hello, Sorry if the question is stupid but I'm a rookie in md things, but I'd like to understand the big picture here. I've been told to use mdadm whenever possible even if my raid is handled by the bios (fake raid) which use the ddf metadata format. (unfortunately it seems that I can't desactive this fake raid in favour of linux soft raid). It's RAID1 BTW. So my question is rather simple: in my understanding the bios is doing the mirroring, but when setting up the md device, linux (kernel or userspace, I don't really know) also handles the mirroring for RAID1 personnality. Is Linux clever enough to see that the mirroring is done by the bios in my case ? Could anybody teach me the big picture ? Thanks a lot. -- Francis