From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Re: Multiple raids on one machine? Date: Sun, 25 Jun 2006 20:16:18 -0400 Message-ID: <449F2752.2000901@tmr.com> References: <449F100D.6030509@cjx.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <449F100D.6030509@cjx.com> Sender: linux-raid-owner@vger.kernel.org To: Chris Allen Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Chris Allen wrote: > Back to my 12 terabyte fileserver, I have decided to split the storage > into four partitions > each of 3TB. This way I can choose between XFS and EXT3 later on. > > So now, my options are between the following: > > 1. Single 12TB /dev/md0, partitioned into four 3TB partitions. But how do > I do this? fdisk won't handle it. Can GNU Parted handle partitions > this big? > > 2. Partition the raw disks into four partitions and make > /dev/md0,md1,md2,md3. > But am I heading for problems here? Is there going to be a big > performance hit > with four raid5 arrays on the same machine? Am I likely to have > dataloss problems > if my machine crashes? No. I regularly run a mix of RAID types over the same drives for performance vs. reliability reasons. And in the past I ran not only RAID-0 and RAID-5 using various partitions, but the stripe size was different as well. Survived a number of unscheduled restarts. -- bill davidsen CTO TMR Associates, Inc Doing interesting things with small computers since 1979