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From: brian@casemo.UUCP (Brian Cuthie )
Newsgroups: comp.periphs,comp.unix.wizards
Subject: Re: Filesystem/archive formats for WORM optical disks
Message-ID: <218@casemo.UUCP>
Date: Tue, 18-Aug-87 09:13:08 EDT
Article-I.D.: casemo.218
Posted: Tue Aug 18 09:13:08 1987
Date-Received: Thu, 20-Aug-87 05:48:22 EDT
References: <1775@kontron.UUCP> <212@casemo.UUCP> <75@cipric.mn.org>
Organization: CASE Communications, Columbia, MD
Lines: 29
Xref: mnetor comp.periphs:531 comp.unix.wizards:3761

In article <75@cipric.mn.org>, dad@ciprico.mn.org (Dan A. Dickey) writes:
> I guess I was under the impression (and still am) that WORM drives would
> be good for doing things like:
> 	dd if=/dev/rrf0g of=/dev/rworm99 bs=32k
> And then mounting /dev/worm99 read-only...
> Of course this presumes that rf0g is a usable good file-system that you
> would like to preserve on optical media.


You're right! you can do this.  But, do you have 1 Gbyte in magnetic disk space
to first create the filesystem you want to dd ??  

The problem with WORM drives is that to use the scheme you suggested you must
have a magnetic disk the size of the WORM drive.  This presents a rather large 
obstacle for most people.

You can of course have the controler or driver break the disk into several
smaller logical volumes and then use dd to copy a complete filesyetem. 

Cheers,
-Brian

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Brian Cuthie
CASE Communications
Columbia, Md. 21046
(301) 290 - 7443

UUCP:	...seismo!mimsy!aplcen!casemo!brian