From owner-freebsd-questions Fri Aug 22 17:09:19 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id RAA11647 for questions-outgoing; Fri, 22 Aug 1997 17:09:19 -0700 (PDT) Received: from hudsucker.gamespot.com (hudsucker.gamespot.com [206.169.18.74]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id RAA11642 for ; Fri, 22 Aug 1997 17:09:17 -0700 (PDT) Received: (from jsd@localhost) by hudsucker.gamespot.com (8.8.5/8.8.5) id RAA03219; Fri, 22 Aug 1997 17:09:22 -0700 (PDT) Date: Fri, 22 Aug 1997 17:09:22 -0700 (PDT) Message-Id: <199708230009.RAA03219@hudsucker.gamespot.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit From: Random Junk To: freebsd-questions@freebsd.org Subject: tape backups unbelievably slow X-Mailer: VM 6.26 under 19.15 XEmacs Lucid Sender: owner-freebsd-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk i'm backing up a freebsd filesystem to a remote tape drive (exabyte 8500 connected to an IRIX machine) with the following command: dump 0af stage:/dev/nrtape /usr this works, but it's so slow that it's almost useless... dump reports transfer rates around 23k/sec. it takes me over 24 hours to back up a single machine! obviously this is way less than ideal. anybody have any ideas on how to improve performance? i tried initiating the dump from the IRIX machine by ssh'ing into the freebsd box and dumping to stdout, then dd'ing onto the tape with a large blocksize. this worked great -- i was getting almost 200k/sec. unfortunately the resultant tapes weren't readable by restore! (i can dd the contents of the tape onto a disk and then restore from that file, but that requires having several gig free on a disk... obviously another less than ideal situation). -- Jon Drukman jsd@gamespot.com SpotMedia Communications ...I was an infinitely hot and dense dot...