From: cowan@mercury.ccil.org (John Cowan)
Subject: [TUHS] why does tar have the tape device hard coded into it and why is it mt1 instead of mt0
Date: Sat, 12 Dec 2015 15:57:27 -0500 [thread overview]
Message-ID: <20151212205727.GE15143@mercury.ccil.org> (raw)
In-Reply-To: <566C6D60.40205@mhorton.net>
Mary Ann Horton scripsit:
> But we never had dectapes and I think they did their own blocking.
Indeed. A DECtape (aka microtape) was logically speaking a floppy disk
sliced into cylinders and then concatenated. As a result it was possible
to rewrite any block without affecting later blocks, something not true
of conventional ("macro") tape.
My first system, a PDP-8/M, used a single DECtape drive as its system
"disk"; the second system, a PDP-8/A, used an 8-inch floppy.
--
John Cowan http://www.ccil.org/~cowan cowan at ccil.org
Don't be so humble. You're not that great.
--Golda Meir
next prev parent reply other threads:[~2015-12-12 20:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-12 2:09 Doug McIlroy
2015-12-12 18:54 ` Mary Ann Horton
2015-12-12 19:58 ` Armando Stettner
2015-12-12 20:13 ` Clem Cole
2015-12-12 22:44 ` Lyndon Nerenberg
2015-12-12 20:57 ` John Cowan [this message]
-- strict thread matches above, loose matches on Subject: below --
2015-12-13 1:41 Norman Wilson
2015-12-13 3:04 ` Lyndon Nerenberg
2015-12-12 17:17 [TUHS] TUHS] " Doug McIlroy
2015-12-12 20:17 ` [TUHS] " Diomidis Spinellis
2015-12-11 22:27 Will Senn
2015-12-11 22:31 ` Clem Cole
2015-12-11 22:52 ` Will Senn
2015-12-11 23:13 ` John Cowan
2015-12-12 0:26 ` Random832
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