From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anton Ekermans Subject: md with shared disks Date: Sun, 09 Nov 2014 10:30:40 +0200 Message-ID: <545F2630.8090307@true.co.za> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Good day raiders, I have a question on md that I cannot find (up to date) answer to. We use SuperMicro server with 16 shared disks on a shared backplane between two motherboards, running up to date CentOS7. If I create an array on one node, the other node can detect it. I put GFS2 on top of the array so both system can share the filesystem, but I want to know if md raid is safe to be used in this way with possibly 2 active/active nodes changing the metadata at the same time. I've disabled raid-check cron job on one node so they don't both resync the drives weekly, but I suspect there's a lot more to it than that. If it's not possible, then alternatively some advice on strategy to have a large active/active shared disk/filesystem would also be welcome. Best regards Untitled Document Anton Ekermans Technical/R&D E-mail: antone true co za Tel: 042 293 4168 Fax: 042 293 1851 Web: www.true.co.za