From owner-freebsd-bugs Wed Mar 8 00:00:37 1995 Return-Path: bugs-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id AAA16829 for bugs-outgoing; Wed, 8 Mar 1995 00:00:37 -0800 Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id AAA16821 for ; Wed, 8 Mar 1995 00:00:29 -0800 Received: from sax.sax.de by irz301.inf.tu-dresden.de with SMTP (5.67b+/DEC-Ultrix/4.3) id AA09451; Wed, 8 Mar 1995 08:20:06 +0100 Received: by sax.sax.de (8.6.9/8.6.9-s1) with UUCP id IAA04317; Wed, 8 Mar 1995 08:20:05 +0100 Received: (from j@localhost) by uriah.heep.sax.de (8.6.9/8.6.9) id HAA02015; Wed, 8 Mar 1995 07:58:33 +0100 From: J Wunsch Message-Id: <199503080658.HAA02015@uriah.heep.sax.de> Subject: Re: QIC-80 problem To: terry@cs.weber.edu (Terry Lambert) Date: Wed, 8 Mar 1995 07:58:33 +0100 (MET) Cc: henryk@gaja.ipan.lublin.pl, freebsd-bugs@FreeBSD.org In-Reply-To: <9503071643.AA24708@cs.weber.edu> from "Terry Lambert" at Mar 7, 95 09:43:56 am Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL23] Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Content-Length: 1229 Sender: bugs-owner@FreeBSD.org Precedence: bulk As Terry Lambert wrote: > > > I have a 486/66 with FreeBSD. > > I just bought a QIC 80 streamer and ftp'd an ft filter. > > It works quite well with tar but only with "B" option. > > When i try to use a "z" option for tar it hangs after > > some time. > Precompress the data. > > Since the interface used by floppy tape drives is the floppy disk > controller, and since the floppy disk controller does not have a > buffer (or a detectable one, if you lucked into one of the new > chips that almost no one uses) this means that it is sensitive > in the extreme to missed I/O. [A very long explanation deleted.] Terry, you might sometimes look as well at the recipient address. This one ended up in .pl, so i'm afraid your fine explanation might be a bit hard to understand... (it's even hard to understand for me, even after following this list for a long time now). But speaking of double-buffering, it should be possible to solve the problem by piping it through a program called ``team'', since it does N-buffering. Why did nobody make a FreeBSD port for ``team'' by now? ;-) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ Never trust an operating system you don't have sources for. ;-)