From owner-freebsd-questions Sun Jul 29 8:33:51 2001 Delivered-To: freebsd-questions@freebsd.org Received: from albatross.prod.itd.earthlink.net (albatross.mail.pas.earthlink.net [207.217.120.120]) by hub.freebsd.org (Postfix) with ESMTP id 9316137B403 for ; Sun, 29 Jul 2001 08:33:48 -0700 (PDT) (envelope-from patron1@paganlibrary.com) Received: from gunnar.weygold.edu (pool0482.cvx11-bradley.dialup.earthlink.net [209.178.189.227]) by albatross.prod.itd.earthlink.net (EL-8_9_3_3/8.9.3) with SMTP id IAA27329; Sun, 29 Jul 2001 08:33:45 -0700 (PDT) Content-Type: text/plain; charset="iso-8859-1" From: Gunnar H Reichert-Weygold Organization: The Pagan Library To: mark tinguely , freebsd-questions@FreeBSD.ORG, own3d@gmx.net Subject: Re: Tape backup with software compression Date: Sat, 28 Jul 2001 09:48:14 -0700 X-Mailer: KMail [version 1.2] References: <200107271522.f6RFMYV29138@web.cs.ndsu.nodak.edu> In-Reply-To: <200107271522.f6RFMYV29138@web.cs.ndsu.nodak.edu> MIME-Version: 1.0 Message-Id: <01072809481402.00652@gunnar.weygold.edu> Content-Transfer-Encoding: 8bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG The stt38000n does not support compression. The stt38000n-c does. On Friday 27 July 2001 08:22, mark tinguely wrote: > > The problem is that i have a backup tape drive (Seagate STT38000N) > > with a capacity of 4GB uncompressed and 8GB compressed. But it does > > not seem to support hardware compression (at least i couldn't > > enable it with 'mt comp on'). > > have you checked the jumper settings for the tape drive? There usually > is a jumper that enables hardware compression. > > second, are you streaming the drive -- delivering the data to the > drive fast enough so that the tape is not stopping and starting. > > > Now im looking for a way to do some software compression on the data > > so that it fits one tape. That way it can be done by a nightly cron job. > > > > As far as i have read in the archives and in the manpage, dump (which > > seems be the best backup tool) does not offer any compression at all. > > Right? > > you can dump to standard output, pipe to gzip, and then dd to tape > to keep the fixed file records. Restore would be done in the opposite > order. > > hardware compress would be better than software compression, so I would > advise you pull out the drive and look at the jumpers located on the > back of the drive. > > --mark tinguely. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message -- Dare to be stupid. Above address is an autoresponder! Correct email address: patron1 at paganlibrary dot com Gunnar H Reichert-Weygold http://www.paganlibrary.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message