Path: utzoo!mnetor!uunet!husc6!think!ames!amdahl!pyramid!voder!apple!rpd
From: rpd@apple.UUCP (Rick Daley)
Newsgroups: comp.sys.mac
Subject: Re: HFS Flames
Message-ID: <7054@apple.UUCP>
Date: 18 Dec 87 01:24:02 GMT
References: <3580@husc6.harvard.edu>
Organization: Apple Computer, Inc., Cupertino, USA
Lines: 14
Summary: UNIX System V does not store redundant directories

In article <3580@husc6.harvard.edu>, singer@endor.harvard.edu (THINK Technologies) writes:
> 	My question: why the HELL isn't there any redundancy in the filesystem?
> Any self-respecting file system (unix comes to mind) has copies of the
> directory stored elsewhere, and can fall back on these copies if necessary.

Unfortunately, I'm no HFS expert and can't really answer your question.
But, I do know my way around System V (AT&T) and pre 4.2 BSD UNIX file
systems.  They do not have any sort of directory redundancy.  I've had
a similar experience with bad disks under UNIX and things get just as
messy.  BSD 4.2 introduced a new file system and I never learned all of
the details.  However, if there are multiple copies of directory stuff
in 4.2, it's news to this UNIX hacker...
						Rick Daley
						rpd@apple.uucp