From owner-freebsd-questions@FreeBSD.ORG Mon Jul 26 20:53:26 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4AB0E106567A for ; Mon, 26 Jul 2010 20:53:26 +0000 (UTC) (envelope-from dak.col@gmail.com) Received: from mail-gw0-f54.google.com (mail-gw0-f54.google.com [74.125.83.54]) by mx1.freebsd.org (Postfix) with ESMTP id 02F3E8FC17 for ; Mon, 26 Jul 2010 20:53:25 +0000 (UTC) Received: by gwj23 with SMTP id 23so297497gwj.13 for ; Mon, 26 Jul 2010 13:53:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=8VvIer2HlfMQMnbiSkpV5wAd3x7d1yYSlr/YhDMznTI=; b=am7TnW4hgBNGTbheTGMXCZR4ZeBJtCiKB7ScRKVhpPiCKwlomLntRo0jvPgCUYMdAo kUUmXS/MPH5CCt+C/7eqvqz1OW/aWxdPj/kzqfqLjiZFt/17oSl0Rhj3U3z/+kUHhhrU xAXbUQpRqPhK3hTdfJ3WL5lT+UC3k3QQNq6Ck= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=wTe1SQe6RFcvN6I61ozm9TiOAhAgBMwK84xZMCZ/UFj39XG9Gu0MzR3sXnezejYd0N ksVzqFjv5cRD04K0DMXq6WBFzfySMQ6i7k2pwMOC9Sw6f/iWCpirHaY+08HpaQ9PLFwO AKCSLffm6P3fnKlBrEXqy/W2GrOuwfq9/zRKs= MIME-Version: 1.0 Received: by 10.90.96.17 with SMTP id t17mr6365260agb.37.1280177605103; Mon, 26 Jul 2010 13:53:25 -0700 (PDT) Received: by 10.90.26.5 with HTTP; Mon, 26 Jul 2010 13:53:25 -0700 (PDT) In-Reply-To: <4C4DF067.7000801@identry.com> References: <4C4DDA28.4070205@identry.com> <980022A0-7623-40A5-BCDE-4909A721933D@mac.com> <4C4DF067.7000801@identry.com> Date: Mon, 26 Jul 2010 15:53:25 -0500 Message-ID: From: Diego Arias To: John Almberg Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-questions@freebsd.org Subject: Re: 1 file system, 2 drives? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Jul 2010 20:53:26 -0000 On Mon, Jul 26, 2010 at 3:30 PM, John Almberg wrote: > > If you have hardware controller with RAID capabilities, using native RAID >> is better, otherwise look towards gvinum or maybe ccd; see also: >> >> > I've just been reading up on RAID in my Absolute FreeBSD book, and it > occurs to me that my client has a SCSI RAID drive chassis that he is using > stupidly... > > It's a 14 bay drive, and he's currently got seven 32G drives stuck in it, > configured with RAID-0. This is the original 200G drive I was talking about. > It's a few years old. > > Over the next few years, this guy is going to need lots of storage for his > videos. > > After a bit of reading, I'm wondering if the best idea might be to toss out > those 32G drives and replace them with 3 big (say, 300G) drives configured > with RAID-5. It sounds to me like a RAID-5 array can be expanded by adding > new drives. > > QUESTION: is expansion normally a matter of just plugging in a new drive? > Is the new drive automatically grafted onto the old drives? Or do you have > to go through a process like, backing up the data, plugging in the new > drive, reformatting the expanded array of drives, and restoring the data. > > I don't know the brand/model of the RAID drive chassis, but the client > thinks it can be switched to use RAID 5. I'm waiting for the technical > details, but assuming it can handle RAID-5 for now. > > Thanks: John > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" > Hi: If the Write-performance its not a problem go with 3 drives. If you need a good write performance go at least with 4 -or- use another RAID level. Maybe the RAID Controller allow RAID 5 Grow but im not shure if FreeBSD can handle it. -- mmm, interesante.....