From owner-freebsd-questions Fri Dec 18 22:38:37 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id WAA02743 for freebsd-questions-outgoing; Fri, 18 Dec 1998 22:38:37 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id WAA02738 for ; Fri, 18 Dec 1998 22:38:32 -0800 (PST) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id RAA19807; Sat, 19 Dec 1998 17:08:16 +1030 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.1/8.9.0) id RAA24698; Sat, 19 Dec 1998 17:08:15 +1030 (CST) Message-ID: <19981219170815.K24125@freebie.lemis.com> Date: Sat, 19 Dec 1998 17:08:15 +1030 From: Greg Lehey To: Gary Kline , questions@FreeBSD.ORG Subject: Re: 4mm tape drive question References: <199812190549.VAA17445@athena.tera.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1i In-Reply-To: <199812190549.VAA17445@athena.tera.com>; from Gary Kline on Fri, Dec 18, 1998 at 09:49:22PM -0800 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Friday, 18 December 1998 at 21:49:22 -0800, Gary Kline wrote: > > > When I bought my 4mm tape drive in '95, 2GB was a _lot_ > of storage; but since I've just added a 9G drive to > my main system, it's time to consider the backups. > > My question: can I use a cassette larger than 90meter > ones I've been using? (And why?) Yes. But it may not do what you think. I'm guessing (since you don't say) that your tape drive is a DDS-1 model. A DDS-1 tape drive can only write in DDS-1 format, which would put 33% more on a 120m tape than on a 90m tape. 120m tapes are usually written in DDS-2 format, which would put 100% more on them than on a 90m tape. More importantly, if you change your DDS-1 tape drive for a DDS-2 one in the future, you may not be able to read the tapes. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message