From: scj@yaccman.com (scj@yaccman.com)
Subject: [TUHS] Early non-Unix filesystems?
Date: Fri, 18 Mar 2016 10:12:27 -0700 [thread overview]
Message-ID: <24e7ae828a0086db2f79ea66165b80bf.squirrel@webmail.yaccman.com> (raw)
In-Reply-To: <CAC20D2M_TUXCq+vESvKYriBpvpLcMyEezPER+U-uhRZun5nCzA@mail.gmail.com>
It may seem strange to us today, but in the context of the day, one of the
most radical ideas in Unix was the concept of a file as an array of bytes,
with lines separated by newline characters. Most mainframes had file
systems that were more or less decks of cards on disk (at one point, the
Bell Labs computing centers estimated that 2/3 of the disc was taken up
with trailing blanks. Layered on top of this was a bit of cruft that
also made the file look like a magnetic tape holding punch card images.
So files had "blocking factors" (how many cards in a contiguous block of
disc).
In the GE (later Honeywell) time sharing system, to create a file, you
entered a subsystem which asked you nearly a dozen questions (name,
initial size, maximum size, device, permissions, etc.) and stored up your
answers and finally did a system call to create the file. The usual
result was that something was wrong in your answer to question 5 and you
had to do the whole dance over again from the top. If you managed to
create a file, the subsystem congratulated you by printing:
Successful!
In this world, typing
echo hello Joe >foo
in Unix, and thereby creating a file, seemed like a miracle -- typically a
first-timer's jaw would drop when I said we had created a file named foo
and showed them that it had contents. Their response was typically about
30 seconds of "But... but.... but... but..." followed by a blinding grin
when they "got it".
Steve
>> That's being unfair to filesystems. You can't call what you got with
>> OS/360 a "filesystem". IMHO, a filesystem needs more than a way to
>> associate a name with a manually-allocated region of DASD.
>>
>> --
>> Peter Jeremy
>>
>
next prev parent reply other threads:[~2016-03-18 17:12 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-18 0:48 Warren Toomey
2016-03-18 2:49 ` Greg 'groggy' Lehey
2016-03-18 3:59 ` John Cowan
2016-03-18 5:11 ` Warren Toomey
2016-03-18 17:45 ` John Cowan
2016-03-18 8:00 ` Dave Horsfall
2016-03-18 8:42 ` Peter Jeremy
2016-03-18 13:04 ` Clem Cole
2016-03-18 17:12 ` scj [this message]
2016-03-18 17:45 ` Random832
2016-03-18 18:02 ` scj
2016-03-21 14:11 ` Dave Horsfall
2016-03-21 21:43 ` Greg 'groggy' Lehey
2016-03-21 22:57 ` scj
2016-03-21 23:05 ` Lyndon Nerenberg
2016-03-22 0:27 ` Greg 'groggy' Lehey
2016-03-23 22:46 ` Dave Horsfall
2016-03-24 0:32 ` Ron Natalie
2016-03-24 0:43 ` Milo Velimirovic
2016-03-24 0:47 ` Ron Natalie
2016-03-24 1:05 ` Clem Cole
2016-03-23 1:28 ` Dave Horsfall
2016-03-23 1:51 ` Milo Velimirovic
2016-03-23 6:49 ` Greg 'groggy' Lehey
2016-03-23 7:02 ` Peter Jeremy
2016-03-23 7:12 ` Greg 'groggy' Lehey
2016-03-23 13:54 ` Ron Natalie
2016-03-23 16:28 ` John Cowan
2016-03-23 8:20 ` Dave Horsfall
2016-03-21 11:07 ` Tony Finch
2016-03-21 12:06 ` John Cowan
2016-03-22 0:13 ` Greg 'groggy' Lehey
2016-03-22 0:48 ` John Cowan
2016-03-18 17:01 ` Pat Barron
2016-03-22 5:21 ` shawn wilson
2016-03-23 0:54 ` Clem Cole
2016-03-23 1:07 ` Clem Cole
[not found] <mailman.1.1458266402.23080.tuhs@minnie.tuhs.org>
2016-03-18 2:13 ` Johnny Billquist
2016-03-18 2:36 ` Charles Anthony
2016-03-18 2:26 Noel Chiappa
2016-03-22 0:56 Doug McIlroy
2016-03-23 1:58 Doug McIlroy
[not found] <mailman.1.1458784801.4499.tuhs@minnie.tuhs.org>
2016-03-24 10:17 ` Johnny Billquist
2016-03-24 11:35 ` Ron Natalie
2016-03-24 11:37 ` Johnny Billquist
2016-03-24 22:50 ` Peter Jeremy
2016-03-24 23:06 ` Johnny Billquist
[not found] ` <9CBDF635-2FC9-4855-8419-0413EC0336A7@centurytel.net>
2016-03-25 0:35 ` Johnny Billquist
2016-03-27 0:48 ` Dave Horsfall
2016-03-24 19:13 Nemo
2016-03-24 19:54 ` Milo Velimirović
2016-03-26 21:05 ` Ronald Natalie
2016-03-26 21:34 ` Charles Anthony
2016-03-26 22:09 ` Ronald Natalie
2016-03-28 20:32 ` scj
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