From owner-freebsd-questions Sat May 23 01:21:21 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id BAA19138 for freebsd-questions-outgoing; Sat, 23 May 1998 01:21:21 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from freebie.lemis.com (freebie.lemis.com [139.130.136.133]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id BAA19133 for ; Sat, 23 May 1998 01:21:13 -0700 (PDT) (envelope-from grog@lemis.com) Received: (from grog@localhost) by freebie.lemis.com (8.8.8/8.8.7) id RAA04939; Sat, 23 May 1998 17:51:11 +0930 (CST) (envelope-from grog) Message-ID: <19980523175110.O317@freebie.lemis.com> Date: Sat, 23 May 1998 17:51:10 +0930 From: Greg Lehey To: Jim Van Baalen , questions@FreeBSD.ORG Subject: Re: rdump question References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1i In-Reply-To: ; from Jim Van Baalen on Fri, May 22, 1998 at 09:56:05AM -0700 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, 22 May 1998 at 9:56:05 -0700, Jim Van Baalen wrote: > I have been dumping several machines to local 8mm drives. Dump writes to > these drives at about 4mbps. What kind of drives are these? Most Exabytes maxe out at about 1 MB/s. > To conserve resources I have been trying to dump to the same model > drive on a remote machine using the : notation. When I do > this dump writes at about .5mbps. Both machines are on dedicated > 10bt switched connections and dump is definitely not taxing the 10bt > connection. Both machines are 266Mhz which I have seen easily fill a > switched 10bt connection. Neither machine is working particulary > hard independent of the dump. I have tried replacing the 3COM 3C905 > Fast Etherlink XL PCI with the Intel EtherExpress Pro 10/100B > because I have had NFS problems while using the 3COM card. It > appears the the default block size for dump is 1024 (as opposed to > 8192 for NFS) so it I didn't think this would work, but I had the > cards... With typical disk capacities of 4-9Gb dumping a drive at > this speed can take over a day. > > Is this expected behavior? I'd expect that of non-compressing dumps. What kind of tape hardware are you using? Are you compressing? Greg -- See complete headers for address and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message