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Newsgroups: comp.unix.bsd.freebsd.misc Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.mira.net.au!inquo!news.uoregon.edu!hunter.premier.net!news.mathworks.com!howland.erols.net!netcom.com!stanb From: stanb@netcom.com (Stan Brown) Subject: Re: HP C1533A DAT tape ? Message-ID: <stanbDzw2rz.6yz@netcom.com> Organization: NETCOM On-line Communication Services (408 261-4700 guest) X-Newsreader: NN version 6.5.0 #3 (NOV) References: <stanbDzLuJv.CEo@netcom.com> <Dzrx1z.9xv@bri.hp.com> <54rce7$9ta@uriah.heep.sax.de> Date: Sat, 26 Oct 1996 15:23:59 GMT Lines: 38 Sender: stanb@netcom10.netcom.com j@uriah.heep.sax.de (J Wunsch) writes: >aslater@jocko.bri.hp.com () wrote: >> : If I can, what device should I use ? Will this device enable >> : the compresion on the tape drive ? >> 1. hack st.c and put in relevant quirks / code to get yourself DC control >> by device file used (code for this isn't hugely difficult) >Ah, it's even simpler. :) >Try the `mt comp 1' command. I've just checked, it's around there at >least since FreeBSD 2.0.5. The man page still lies that it were not >implemented though... but i cannot remember a single feedback whether >it's actually working now. It has been implemented blindly after the >SCSI-2 specs by Julian Elischer. Well, since I have the hardware handy, I'll check it :-) Can anyone think of a way to check to see whether the tape s really being writeen with compression (assuming I don't have ahandy data set bigger than the uncompressed tape size ? Would backing it up and trying to read it on a non-compression drive work ? I have one of those at work, and I seem to remember ocasianly geting read failures on tapes in it. Whe I put these tapes in the comprresion mode drive the read OK. Does this make sense ? >-- >cheers, J"org >joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE >Never trust an operating system you don't have sources for. ;-) -- Stan Brown stanb@netcom.com 404-996-6955 Factory Automation Systems Atlanta Ga. -- Look, look, see Windows 95. Buy, lemmings, buy! Pay no attention to that cliff ahead... Henry Spencer (c) 1996 Stan Brown. Redistribution via the Microsoft Network is prohibited.