From owner-freebsd-questions Mon Jan 28 1:48:31 2002 Delivered-To: freebsd-questions@freebsd.org Received: from guru.mired.org (dsl-64-192-6-133.telocity.com [64.192.6.133]) by hub.freebsd.org (Postfix) with SMTP id 66A7937B416 for ; Mon, 28 Jan 2002 01:48:26 -0800 (PST) Received: (qmail 32014 invoked by uid 100); 28 Jan 2002 09:48:20 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15445.7779.734256.831416@guru.mired.org> Date: Mon, 28 Jan 2002 03:48:19 -0600 To: Matt Penna Cc: questions@freebsd.org Subject: Re: dump, restore - active vs. inactive filesystem In-Reply-To: <5.1.0.14.2.20020128000623.028ba430@vmspop.isc.rit.edu> References: <121485656@toto.iv> <5.1.0.14.2.20020128000623.028ba430@vmspop.isc.rit.edu> X-Mailer: VM 6.90 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid X-face: "5Mnwy%?j>IIV\)A=):rjWL~NB2aH[}Yq8Z=u~vJ`"(,&SiLvbbz2W`;h9L,Yg`+vb1>RG% *h+%X^n0EZd>TM8_IB;a8F?(Fb"lw'IgCoyM.[Lg#r\ From: "Mike Meyer" X-Delivery-Agent: TMDA/0.44 (Python 2.2; freebsd-4.5-RC-i386) Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Matt Penna types: > Jonathan and Mike, thanks for the responses! Comments below: > At 07:19 PM 1/27/02 -0600, Mike Meyer wrote: > >Matt Penna types: > > > Does mounting a filesystem read-only mean it's inactive? (I suspect not.) > >A file system mounted read-only is inactive. > Thanks for clearing that up! > > >You have three options. 1) Unmount the file system. 2) Mount the file > >system read-only. 3) Dump it in single-user mode, making sure nothing > >else is going on on the system. > What's the best way to handle this on a production system? None of the > above suggestions is practical on very large volumes that take an extended > period of time to back up or on high availability systems. "Just run the > dump while the filesystem's mounted read/write and hope for the best," is > of course always an option, though perhaps not an ideal one. :) You don't dump it, you use a raid system that supports hot-swapping the drives, and keep two (or more) copies of everything. http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message