From owner-freebsd-hardware Thu Jan 25 19:32:53 2001 Delivered-To: freebsd-hardware@freebsd.org Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.80]) by hub.freebsd.org (Postfix) with ESMTP id B187137B69D; Thu, 25 Jan 2001 19:32:35 -0800 (PST) Received: by wantadilla.lemis.com (Postfix, from userid 1004) id 607066AB73; Fri, 26 Jan 2001 14:02:33 +1030 (CST) Date: Fri, 26 Jan 2001 14:02:33 +1030 From: Greg Lehey To: Mike Smith Cc: Kevin Oberman , FreeBSDHW Subject: Re: Hard Drive cloning Message-ID: <20010126140233.C1222@wantadilla.lemis.com> References: <200101252147.f0PLlkc05475@ptavv.es.net> <200101260008.f0Q08G100618@mass.dis.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200101260008.f0Q08G100618@mass.dis.org>; from msmith@freebsd.org on Thu, Jan 25, 2001 at 04:08:16PM -0800 Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.lemis.com/~grog X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thursday, 25 January 2001 at 16:08:16 -0800, Mike Smith wrote: >> Mike, >> >> I had never run into team before. It looks interesting. >> >> Have you any suggestions for reasonable values for 'team' to use for >> dd? >> >> I assume the syntax would be: >> dd bs=NNNNN if=/dev/adNsN | team NNNNN X | dd bs=NNNNN of=/dev/adNsN > > That's more or less what I'd recommend. > > To take best advantage of FreeBSD's "fast wide pipe" support, the block > size should be > 64k; I've had good results around 1M. More than that is > probably wasteful, and may run you out of physical memory... More than 128 kB doesn't help much. That's MAXPHYS, the maximum I/O transfer size. Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message