From owner-freebsd-questions@FreeBSD.ORG Mon Jul 26 19:12:52 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 CE048106566B for ; Mon, 26 Jul 2010 19:12:52 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-pw0-f54.google.com (mail-pw0-f54.google.com [209.85.160.54]) by mx1.freebsd.org (Postfix) with ESMTP id A03C28FC14 for ; Mon, 26 Jul 2010 19:12:52 +0000 (UTC) Received: by pwj9 with SMTP id 9so244814pwj.13 for ; Mon, 26 Jul 2010 12:12:52 -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=/G6lQWYF4Ip9n4gZzYBpCJh1qK8tComh6cI2aC/oB/8=; b=H4Xr6PLZor+3XfHnmCsnyslyl5rtpmJoCd5LqRoIFIvGdV+mMYxPllqDeMQhIKOHth aOi9YDzJJRQ7KeZD4wlBBmsu+zECv1uQd3tlvXvyu9dED5SHumiMQpp8q8j1di/l0oyW mQG7ZI/1vCN27tltMtHN2vD+kK/DSE5nA3wKs= 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=cZHj7cNWCmFX4nvOuo1NSdiKDHq5BLn7g/LishY2VM7DQgmzREoPqKX4kjQcyQnY39 fZOOVOb7ZyS8fuwH/fMbvKRqg81XRBkCWmP6RsLj31jez3MHwhsUL8ckMhMUnX996RPB lx7wPKgFXjenXvQT8TDSFeUsNxqf9B7z/lGEg= MIME-Version: 1.0 Received: by 10.142.194.15 with SMTP id r15mr9409967wff.276.1280171571833; Mon, 26 Jul 2010 12:12:51 -0700 (PDT) Received: by 10.229.29.71 with HTTP; Mon, 26 Jul 2010 12:12:51 -0700 (PDT) In-Reply-To: <980022A0-7623-40A5-BCDE-4909A721933D@mac.com> References: <4C4DDA28.4070205@identry.com> <980022A0-7623-40A5-BCDE-4909A721933D@mac.com> Date: Mon, 26 Jul 2010 14:12:51 -0500 Message-ID: From: Adam Vande More To: Chuck Swiger Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: John Almberg , 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 19:12:53 -0000 On Mon, Jul 26, 2010 at 2:05 PM, Chuck Swiger wrote: > Hi, John-- > > On Jul 26, 2010, at 11:55 AM, John Almberg wrote: > > I know this is probably impossible, but FreeBSD can do so many miraculous > things, that I can't help asking... > > > > Is it possible to use the second drive to 'expand' the /videos file > system? So it would miraculously look like a single 400G drive? > > The canonical way of doing this is to either create a RAID-0 concat or > stripe volume. Using RAID-0 striping is preferred due to performance, but > you'd need to backup, reformat using a RAID-0 stripe, and then restore your > data onto the new volume. In theory, setting up a concat is less intrusive, > but if the data is already mounted and in use, you'll probably still need to > unmount it first. > > If you have hardware controller with RAID capabilities, using native RAID > is better, otherwise look towards gvinum or maybe ccd; see also: > There is also gconcat(8), IMO much easier than gvinum although not all the power either. ZFS sort has this as well, if you replace devices with bigger devices the pool with grow to the size of the smallest device. -- Adam Vande More