From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Neufeind Subject: Extendable raid - with soft-raid 5 and new mdadm? Date: Sun, 31 Oct 2004 19:30:10 +0100 Message-ID: <41852F32.3000405@stefan-neufeind.de> 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 Hi, I was wondering how to set up an extendable raid, just for backup/data storage. It doesn't need to be high-performant - so imho I don't need a hardware-raid. To provide a minimum of security I was wondering about using a soft-raid 5 under Linux. However, I need to be able to extend the raid, if backup demand rises. Therefor I plan to use a raid 5 with three or four devices at the moment and need to be able to add more as the requirements grow. I saw that in mdadm, version 1.7.0, there was a "grow"-feature introduced. However, at present it just works fine for raid 1 as far as I know. Can somebody tell me, if it will shortly (in the next few month) be possible to extend a soft-raid 5 with mdadm as well? What do you think about data-security? And do I need a plain raid 5 with ext3 on it or should I maybe put an LVM on top of raid 5 to be flexible? Your feedback would be very much appreciated. Regards, Stefan