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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!nntp.coast.net!howland.erols.net!feed1.news.erols.com!insync!enews.sgi.com!news.sgi.com!sdd.hp.com!usc!math.ohio-state.edu!jussieu.fr!pasteur.fr!oleane!in2p3.fr!univ-lyon1.fr!fdn.fr!r2d2.fdn.org!med.univ-tours.fr!univ-angers.fr!univ-rennes1.fr!irisa.fr!news-rocq.inria.fr!news2.EUnet.fr!newsbr.eunet.fr!usenet From: Frederic.Marand@osinet.fr (Frederic MARAND) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: whats a good external SCSI tape? Date: Tue, 05 Nov 1996 07:06:12 GMT Organization: Groupe SEDI / Agorus SA / OSI SARL Lines: 36 Message-ID: <55mshd$5oi@newsbr.eunet.fr> References: <DzHp5B.6Bt.G.nanguo@nanguo.chalmers.com.au> <54dhae$3gs@uriah.heep.sax.de> <54j67v$soq@newsbr.eunet.fr> <BZOzHFO.smartsignal@delphi.com> <55lovg$hs0@baygull.rtd.com> NNTP-Posting-Host: 193.107.196.155 dgy@rtd.com (Don Yuniskis) wrote: >>- Doubtless a fear of the misunderstood. Helical scan has been used >>successfully for forty years to handle video and data recording. By the way, there is an interesting article in IEEE Spectrum's February 96 issue about the creation of the helical scan mechanism in 1956. This a technology with one name, but that has had a lot of variants since its inception. >> Maybe it just sounds >>scary! Wonder how nervous the anecdote driven would get if they really >>knew how DRAM worked? Imagine all those precious bit patterns nestled >>in a matrix of myriads of tiny capacitors - Egads! You mean my data has >>a time constant! If some thing called refresh doesn't happen my bits do >>what??? Pass transistors? Huh? Oh well, back to work. See, the DLT cartridge is scary, rather more thand its drive mechanics : the tape can go out ! We had some questions about this aspect from our first DLT customers, who were afraid the tape would unroll and the end of the tape be damaged. By the way, would anyone know why a DLT is much slower than a DAT using TAPEDAI.NLM on a NetWare 4.10 server ? It speeds properly with Seagate's Storage Manager driver, but only gives about 100 kB/s with the NetWare driver ! I know this is not a Netware forum, but I found none, and Novell's only answer is: this is an unsupported drive and it does not emulate a standard SCSI tape very successfully. How is it supported on FreeBSD ? Any specific changes to the standard SCSI tape driver ? ------------------------- Frederic G. MARAND Agorus SA / OSI SARL Frederic.Marand@osinet.fr -------------------------