From mboxrd@z Thu Jan 1 00:00:00 1970 From: Petro Message-ID: <20030312195217.GC18876@auctionwatch.com> Mime-Version: 1.0 Content-Disposition: inline Subject: [linux-lvm] Problems and questions with LVM on a large raid system. 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: Wed Mar 12 13:53:01 2003 List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com I've got a couple of brand new boxes I'm trying to get LVM set up properly on. These machines have 6 200GiB drives attached to a 3ware controller card, for a total of 1,200,000,000,000 bytes of storage. I'm running kernel 2.4.18, with LVM version 1.0.3, and the lvmtools version 1.0.1rc3-1 (long story, but upgrading is a path-of-last-resort). Initially I had the drives set up as a single raid0 device, but doing a pvcreate on it failed with a message that said something about "can't get size". So I set up 2 3 disk RAID0 devices, and did a vgcreate /dev/sda /dev/sdb. Now, one question I have is: Does this concatenate the devices, or does it interleave the devices? IE do I have a stripe of stripes, or two stripes? Since I need the disk write rate of all 6 drives, I'm *REALLY* hoping that it's interleaved. -- "On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question." -- Charles Babbage