From owner-freebsd-questions@FreeBSD.ORG Tue May 2 00:04:11 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id AF8B016A401 for ; Tue, 2 May 2006 00:04:11 +0000 (UTC) (envelope-from grog@lemis.com) Received: from ext-gw.lemis.com (ext-gw.lemis.com [150.101.14.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1A96C43D45 for ; Tue, 2 May 2006 00:04:10 +0000 (GMT) (envelope-from grog@lemis.com) Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.135]) by ext-gw.lemis.com (Postfix) with ESMTP id 2008E131D4A; Tue, 2 May 2006 09:34:10 +0930 (CST) Received: by wantadilla.lemis.com (Postfix, from userid 1004) id 0774385562; Tue, 2 May 2006 09:34:10 +0930 (CST) Date: Tue, 2 May 2006 09:34:10 +0930 From: Greg 'groggy' Lehey To: Jim Stapleton Message-ID: <20060502000409.GZ81777@wantadilla.lemis.com> References: <80f4f2b20605011644r87563a0r9141d4a62a28b98b@mail.gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="alCHniwhwUTljuKz" Content-Disposition: inline In-Reply-To: <80f4f2b20605011644r87563a0r9141d4a62a28b98b@mail.gmail.com> User-Agent: Mutt/1.4.2.1i Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 VoIP: sip:0871270137@sip.internode.on.net WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 9A1B 8202 BCCE B846 F92F 09AC 22E6 F290 507A 4223 Cc: freebsd-questions@freebsd.org Subject: Re: dd issues 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: Tue, 02 May 2006 00:04:11 -0000 --alCHniwhwUTljuKz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Monday, 1 May 2006 at 19:44:00 -0400, Jim Stapleton wrote: > I'm trying to back up some of my software, and I'm having some > problems, I found something in the archives specifying the need to set > a block size of 2k or greater. This makes a backup (I've not tested it > yet). > > My questions are: > (1) Why does this work? Why shouldn't it? > (2) Is it possible that not using the default/found block size will > cause issues? Yes. Without more background in what you're trying to do (you don't even say what backup program or what medium you're trying to back up to), or what your concerns are, it's difficult to answer this question. There are no specific issues with block size on most archivers, but in general large block sizes (64 kB or larger) will give better performance. Greg -- When replying to this message, please copy the original recipients. If you don't, I may ignore the reply or reply to the original recipients. For more information, see http://www.lemis.com/questions.html See complete headers for address and phone numbers. --alCHniwhwUTljuKz Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFEVqH5IubykFB6QiMRAsWFAJ97ngRP1C2rS3FU1+fPdT7z74WKswCggFWU uWnNR6E3jL6Y7Kzp4jHwDRQ= =OAjZ -----END PGP SIGNATURE----- --alCHniwhwUTljuKz--