From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Brown Subject: Direct disk access on IBM Server Date: Tue, 19 Apr 2011 15:21:39 +0200 Message-ID: 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 I have recently got an IBM x3650 M3 server, which has a "Serveraid M5014" raid controller. Booting from a Linux CD (system rescue CD) and running lspci identifies this raid controller as: LSI Logic/Symbus Logic Megaraid SAS 2108 [Liberator] (rev 03) The controller works fine for hardware raid - I can open its bios setup utility, and set up a RAID5 (or whatever) with the disks I have. The OS then just sees a single virtual disk. But I would like direct access to the sata drives - I want to set up mdadm raid, under my own control. As far as I can see, there is no way to put this controller into "JBOD" or "direct access" mode of any sort. Does anyone here have experience with this card, or can give me any hints? The only idea I have at the moment is to put each disk within its own single-disk RAID 0 set, but then I don't get sata hot-swap functionality, SMART, hddtemp, etc. Thanks for any clues or hints, David