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From: guy%gorodish@Sun.COM (Guy Harris)
Newsgroups: comp.unix.wizards,comp.unix.questions
Subject: Re: Another Annoying Microport Inquiry
Message-ID: <30573@sun.uucp>
Date: Sun, 11-Oct-87 02:17:42 EDT
Article-I.D.: sun.30573
Posted: Sun Oct 11 02:17:42 1987
Date-Received: Mon, 12-Oct-87 21:17:50 EDT
References: <1408@dasys1.UUCP> <6475@brl-smoke.ARPA> <116@suprt.UUCP> <15478@topaz.rutgers.edu>
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Keywords: Microport patch ulimit
Xref: mnetor comp.unix.wizards:4824 comp.unix.questions:4489

> You're memory is failing you.  V6 file systems have doubly indirect blocks.

No, my memory isn't failing me.  V6 file systems had doubly indirect blocks;
however, *PWB/UNIX 1.0* systems didn't.  They replaced the doubly indirect
block with an extra singly-indirect block, and eliminated huge files entirely.
Check out the "FILE SYSTEM(V)" manual pages for V6 and PWB/UNIX 1.0; the former
mentions huge files, the latter doesn't.

One mildly amusing aspect of this is that the predecessor to "fsck", called
"fcheck", was distributed in source form with PWB/UNIX 1.0; however, it was
written for V6 file systems, not PWB/UNIX 1.0 file systems.

(Speaking of ancient history, take a look at the 4.3BSD "ar" command,
specifically the set of #defines just before the "longt" routine.)
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com