From owner-freebsd-questions Wed Dec 18 23:19:46 1996 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id XAA05198 for questions-outgoing; Wed, 18 Dec 1996 23:19:46 -0800 (PST) Received: from gdi.uoregon.edu (cisco-ts9-line3.uoregon.edu [128.223.150.84]) by freefall.freebsd.org (8.8.4/8.8.4) with ESMTP id XAA05193 for ; Wed, 18 Dec 1996 23:19:44 -0800 (PST) Received: from localhost (dwhite@localhost) by gdi.uoregon.edu (8.8.2/8.6.12) with SMTP id XAA00283; Wed, 18 Dec 1996 23:19:35 -0800 (PST) Date: Wed, 18 Dec 1996 23:19:35 -0800 (PST) From: Doug White Reply-To: dwhite@resnet.uoregon.edu To: Carey Nairn cc: questions@freebsd.org Subject: Re: Backing up on HP1533A In-Reply-To: <3.0.32.19961219150444.00719140@falcon.pacit.tas.gov.au> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Thu, 19 Dec 1996, Carey Nairn wrote: > I am attempting to backup on the above drive with 120m tapes. When dump > estimates number of tapes for a 9GB disk it suggests ridiculous numbers of > tapes. (My estimate would be just over 2 tapes). > The command line I used was > > dump 0udf 61000 /dev/nrst0 /filesystem_name You're using the old dump options. Look at the B and b options. We use the following command line for a 4gb tape to backup root: rdump 0uBbf 2000000 10 resnet2.uoregon.edu:/dev/nrst0 / I think dump is end-of-tape smart and will properly detect the end of tape, so our numbers here aren't quite right. b = kilobytes per tape block <- vary this if your tape doesn't want to stream B = number of blocks per tape Remove your d option, use B and b, and your tape suggestion should work much better. > any suggestions for a reasonable density value (or how to make the hardware > compression work on the drive) ??? I can't say anything about compression, sorry. Rest should work OK though. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major