From owner-freebsd-stable Sat Aug 1 13:00:51 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id NAA16611 for freebsd-stable-outgoing; Sat, 1 Aug 1998 13:00:51 -0700 (PDT) (envelope-from owner-freebsd-stable@FreeBSD.ORG) Received: from SchematiX.net (schematix.net [24.234.31.158]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id NAA16601 for ; Sat, 1 Aug 1998 13:00:47 -0700 (PDT) (envelope-from scott@SchematiX.net) Received: from localhost (scott@localhost) by SchematiX.net (8.8.8/8.8.8) with SMTP id MAA00337; Sat, 1 Aug 1998 12:53:57 -0700 (PDT) (envelope-from scott@SchematiX.net) Date: Sat, 1 Aug 1998 12:53:57 -0700 (PDT) From: Scott To: "Louis A. Mamakos" cc: Nathan Dorfman , Andrew Bromage , freebsd-stable@FreeBSD.ORG Subject: Re: CD writers as a backup medium In-Reply-To: <199808011928.PAA12685@whizzo.transsys.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sat, 1 Aug 1998, Louis A. Mamakos wrote: > > > tapes may be 4GB, but most of them are extremely slow compared to a CD-R. > > Even some of the fastest tape drives aren't as fast as a 4x CD-R (last > > time i checked). Tape drives are also a lot more expensive and the tapes > > are EXTREMELY expensive. CD-R disk can be found for $1 or less if you have > > a rebate. Tapes for my TR1 drive (old; never in use anymore) are $30 > > each...and i have 5 tapes for them. So it really comes down to how much > > money you have. > > > > Sounds like you should have bought a DAT tape then. should have but at the times i had a budget of $200 > > A DDS-2 drive (without compression) has a 326 kByte/s transfer rate; this > will be somewhat larger if you've got compression enabled in the drive. So > you'll have 4 GB uncompressed on a 90 meter tape and perhaps twice that > with compression enabled. > > If this is large enough to hold your dump, then in some sense you don't > really care what the transfer rate is if you don't have to swap media. i was only using my backups to store junk i downloaded. (Back in my windows days) > > I bought a reconditioned DDS-2 changer (that holds 4 or 12 tapes depending > on the magazine) for a bit less than $400. Media is about $7-$12 depending > on what you find. Thats some serious data storage. Brand new that thing would be extremely expensive. > > DDS-3 increases the capacity (and thus transfer rate) again. I think the > media cost might be a wash between CD and DAT for bulk storage. The CD > media is less clostly, but has a factor of about 3 or 4 less capacity. The > DAT media is resuable - sure, you can get rewritable CD media, but now the > cost is considerably higher. CDs are so cheap nowdays that there is no sense for a rewritable when it would be just as quick/easy to rewrite the whole thing. > > Clearly the Travan drives lose on a cost measure - the drives are cheap, but > you go broke buying the media. you can say that again :) > > louie > -scott To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message