From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Lembark Subject: Re: [linux-lvm] LVM Striping question Message-ID: <9810000.1008525655@dizzy> In-Reply-To: <25E4CA13D679FF48BC30769420220971467A23@nd1-clusa.local.bunnings.com.au> References: <25E4CA13D679FF48BC30769420220971467A23@nd1-clusa.local.bunnings .com.au> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Mon Dec 17 00:01:01 2001 List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-lvm@sistina.com -- Colin Coe > I have a Linux system using LVM and SGI XFS. I have just added a second > hard disk and I want to change the LVM config so it now stripes over both > hard drives. Also, is this striping RAID0 or RAID1? If it is only RAID0, > how can I do RAID1? Striping has nada to do with RAID. You can stripe new LV's as you create them to use the new PV's. If you are not using RAID to manage the PV's themselves then loosing one disk will loose all of the data on any LV's striped across it. Safest way to use striping is across PV's that are themselves RAID1 or RAID5 [let's assume noone uses RAID3 for much anymore]. At that point the RAID protects you from hardware failure and the LVM striping at the LV level spreads out the I/O to allow the RAID component to catch up. The existing volumes can't be striped on the fly; you'd have to copy the contents to new, striped LV's. -- Steven Lembark 2930 W. Palmer Workhorse Computing Chicago, IL 60647 +1 800 762 1582