From owner-freebsd-questions Wed Nov 7 9:42:31 2001 Delivered-To: freebsd-questions@freebsd.org Received: from sleipner.eiffel.dk (sub19-229.member.dsl-only.net [63.105.19.229]) by hub.freebsd.org (Postfix) with ESMTP id E51A037B405 for ; Wed, 7 Nov 2001 09:42:28 -0800 (PST) Received: from froekjaer.org (danevirke.eiffel.dk [216.99.212.67]) by sleipner.eiffel.dk (8.11.6/8.11.6) with ESMTP id fA7Hw3965131; Wed, 7 Nov 2001 09:58:04 -0800 (PST) (envelope-from flemming@froekjaer.org) Message-ID: <3BE9728A.90403@froekjaer.org> Date: Wed, 07 Nov 2001 09:42:34 -0800 From: Flemming Froekjaer User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:0.9.4) Gecko/20011016 X-Accept-Language: en, da MIME-Version: 1.0 To: Odhiambo Washington Cc: FBSD-Q Subject: Re: Backup Tapes - Advise sought References: <20011107162126.H66293@ns2.wananchi.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit 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 Odhiambo Washington wrote: >Hi, > >I need to buy a tape drive. Some sales geek has suggested HP Surestore DAT40 - a DDS-4 >tape drive. I've gotten mixed up with this DDS and DLT stuff. What's the difference? >I am not quite familiar with tapes. > >Does someone recommend something else different than the one here? >I also welcome any reasons supporting some particular type of tape drive. > The DLT drive is faster, bigger, cost more and so does the tapes (initialy) The real differens is that the head on a DAT tape drive rotates. This meanes that the tapes does not last as long as the DLT tapes, where the head is stationary. It also meanes that you might experies tracking problems if you try to restore on a different drive that the one that made the backup. Finaly if your disk system is not fast enough to feed the DLT drive you will see a huge slow down. Because the drive vill run out of data, then it has to rewind and find the end of the data and start writing again. The DAT drive is the same, but is slower so it is less likely to happen. \Flemming To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message