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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.mel.connect.com.au!news.mira.net.au!news.vbc.net!samba.rahul.net!rahul.net!a2i!news.PBI.net!news.mathworks.com!newsfeed.internetmci.com!news.sover.net!news.monad.net!usenet From: Paul Venezia <pvenezia@top.monad.net> Newsgroups: comp.unix.admin,comp.unix.questions,comp.unix.misc,comp.unix.bsd.bsdi.misc Subject: Re: ideal parameters for backup tape Date: Sun, 15 Sep 1996 02:26:28 -0400 Organization: MonadNet Corp. Lines: 38 Message-ID: <323BA194.735A@top.monad.net> References: <323954B8.167EB0E7@innet.be> NNTP-Posting-Host: jpj.hq.monad.net Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 2.02Gold (Win95; I) To: Walter Lievens <wally@innet.be> Xref: euryale.cc.adfa.oz.au comp.unix.admin:47377 comp.unix.questions:87674 comp.unix.misc:25102 comp.unix.bsd.bsdi.misc:4873 Walter Lievens wrote: > > I need to backup my files using (ufs)dump. The problem is that I don't > know which parameters are ideal. Can someone help me? > > Here is the available information of the tape: > Sony, DAT, DG90MAa, 90 m/295 feet, DDS, 4 mm > > I'm using as platform BSDI (dump) and Solaris 2.4 (ufsdump). > > Currently my two commands are: > > dump 0dsbfu 54000 13000 126 remote_tape filesystem > > ufsdump 0dbfu 54000 126 remote_tape filesystem > > I don't know if the parameters are good. > > BTW, does anyone know how much information I can put on such a tape? How much data depends on the size of the tape. A 120 meter DAT will take approx. 8 gigs, provided you have a drive that will do compression, such as an Archive Python. a 90 mete tape stores approx 4 gigs, compressed. So, with the Sony, you'll get approx. 4 gigs. AFA the syntax for the BSDI dump command, here's what I use to dump an entire partiton to tape: dump 0uBf 12288000 /dev/nrst0 /dev/sd0a Check the man pages to figure out exactly what this does, but basically, it moves the entire /dev/sd0a partiton to the tape drive, compressed. -- Paul Venezia - MonadNet System Administrator pvenezia@top.monad.net MonadNet Corporation | Email: request@monad.net | Information:(603)352-7619 322 Winchester St. | http://www.monad.net | TechSupport:(603)358-2497 Keene, NH 03431-3936 | http://top.monad.net/~techsupport | Fax:(603)357-1267