Date: Thu, 26 Feb 2004 10:50:01 +0100 From: Wilko Bulte <wkb@freebie.xs4all.nl> To: Kevin Oberman <oberman@es.net> Cc: cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/usr.sbin/fdcontrol fdcontrol.8 Message-ID: <20040226095001.GA23188@freebie.xs4all.nl> In-Reply-To: <20040225232804.AECD55D07@ptavv.es.net> References: <20040225192838.GA19381@freebie.xs4all.nl> <20040225232804.AECD55D07@ptavv.es.net>
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On Wed, Feb 25, 2004 at 03:28:04PM -0800, Kevin Oberman wrote: > > Date: Wed, 25 Feb 2004 20:28:38 +0100 > > From: Wilko Bulte <wkb@freebie.xs4all.nl> > > Sender: owner-cvs-all@freebsd.org > > > > On Wed, Feb 25, 2004 at 07:34:26PM +0100, Poul-Henning Kamp wrote: > > > In message <20040225181946.GA18703@freebie.xs4all.nl>, Wilko Bulte writes: > > > > > > >> PS: If anybody has a manual for the Y-E data YD174 8" drive I'd > > > >> love to get a scan or copy. > > > > > > > >Too modern.. 8" 128KB (IIRC) DEC RX01 are the way forward :-P > > > > > > Well, the objective is to read all sorts of formats, not to demostrate > > > the second law of thermodynamics. > > > > But it sure could rotate disks full of sand using its 115V AC motor. :) > > > > It needed to, as the PDP that used it was the control CPU for a > > concrete mixing factory. I just vacumed out all of the sand and cement > > dust, stuck new media in and it ran. Now *that* is NonStop hardware > > (pun intended). > > Time to put on my old fart hat on. > > If you want an old portable media system that is REALLY "NonStop" (and > makes an RX01 look really fast), take a look at DECtape (nee LINCtape) > developed by MIT's Lincoln Lab. I spent a lot of time doing nightly > re-links of our main mapping tool for an atmospheric flow analysis > project on a GT-42 running RT-11 on DECtape. Started the build at about > 17:00 and it usually finished up at about 08:00 the following > morning. (And, if you thought Windows 98 was slow to boot...) > > The tape could be spun into a trash can, stomped down with a boot, > covered with dirt, re-wound onto the reels, and be read without > error. It was random access and all data was recorded redundantly with Ah ja.. in case of need you could even run the tape reels by hand, say if a reel motor broke. Overengineered in the xtreme. A friend of mine still has some running in his little museum. -- Wilko Bulte wilko@FreeBSD.org
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