From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <3CB365F4.F90C2347@silicide.dk> From: Jon Bendtsen MIME-Version: 1.0 Subject: Re: [linux-lvm] multiple volumes.. References: <18044083656.20020409231800@tnonline.net> Content-Transfer-Encoding: 7bit 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: Tue Apr 9 17:06:02 2002 List-Id: Content-Type: text/plain; charset="us-ascii" To: linux-lvm@sistina.com Anders Widman wrote: > > I have a problem which I want to solve as efficiently as possible. > > The problem is that I have 13 drives os various sizes (30-120GB) which > I want to combine into one (or a few) logical volumes with redundancy > if one drive would fail. 13 disks... in one computer. How many controllers do you have ?? Are they all filled up ?? aka, using hd > How would the smartest layout be? I was thinking about multiple > partiontions and then combine them into several RAID 5 chains, and > then use LVM to manage the logical volumes. And how many disks would you have in your raid5 thingy ?? Way too many pr. controller i fear. Only run one (active) ide hd pr. controller. As for scsi, more, but not many more. Why not use raid1, or possibly, raid0 ontop of raid1? > There is an expamle of my ideas at http://www.tnonline.net/raid-lvm.png > As you can see there are 8 chains and about 50 GB unallocated data in > this example. Can I minimize the loss even better? Yes, you could avoid it. Run raid1 on much of it, possibly raid0 on top for speed. The 30GB disk, and the leftovers from the 2*75GB disks, can with the leftovers from the 120GB disk be turned into raid1 partitions. > Any help or insight in this would be greatly appreciaded More info about the disks, ide, scsi, mixed, controllers ?? JonB