Date: Thu, 6 Jan 2000 20:50:42 +0100 (MEZ) From: Gerhard Gonter <gonter@maestria.wu-wien.ac.at> To: kdrobnac@mission.mvnc.edu Cc: freebsd-fs@FreeBSD.ORG Subject: Re: CD-RW long filenames/rw filesystem. Message-ID: <200001061950.UAA33986@maestria.wu-wien.ac.at> In-Reply-To: <Pine.BSF.4.05.10001052142420.61287-100000@login-1.eunet.no> from Marius Bendiksen at "Jan 5, 2000 09:44:21 pm"
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According to Kenny Dobnack:
> [...] In FreeBSD, the only way (it seems) to use
> it, is grab a bunch of stuff you want to backup/record and use mkisofs and
> cdrecord to dump it onto a CD. Everything I read seemed to indicate that
> this method limits you to the 8.3 filename format of iso9660 and all
> Rockridge does is add file/group permissions and ownership.
Rockridge allows you to use long filenames too and mkisofs which can be
found in the cdrecord port handles without problems. cdrecord with
mkisofs can be found in the ports collection in sysutils/cdrecord. To
create a Rockridge image from an archive directory, use a command like
mkisofs -o my-image.rr -R -T -V My-Image /archive/my-directory
-R enables the Rockridge extensions, -T adds translation tables with short
and long filename versions.
> Next question. Under Windows, there was a program called Adaptec
> Direct CD that pretty much allowed you to treat a CD-RW disc as "a really
> big floppy disk" (I think that was from the docs). You can save a file to
> the CD-RW and then delete it later if you want to.
This software is, as far as I know, a UDF filesystem driver. UDF
stands for Universial Disk Format and it's specs can be found on the
web [1].
> Would it be possible,
> or even feasible, to implement something like this in FreeBSD?
If someone sits down and writes an UDF driver, sure ;) However, I
never saw UDF and FreeBSD mentioned in one article before. FWIW,
there's one (or maybe two?) Linux UDF project [2, 3], both(?) appear to
be moving rather slowly. They seem to provide only read support for
UDF yet.
Marius Bendiksen later commented:
> Probably, but is there really much demand for this in a server OS?
I'm not sure if UDF is used a lot at all, and considering current
prices for CD-RW media and cheap hard disks, it does not even make
much sense (at least for me) to use CD-RW like big floppies.
> You can blank the CD-RW medium, with wormcontrol...
The command "cdrecord blank=fast" does the same.
References:
[1] OSTA Univeral Disk Format Specification Revision 2.00
http://www.bitwizard.nl/udf/udf200.pdf
[2] The Linux UDF file system driver
http://www.bitwizard.nl/udf/
[3] http://www.trylinux.com/projects/udf/index.html
+gg
--
Gerhard.Gonter@wu-wien.ac.at Fax: +43/1/31336/702 g.gonter@ieee.org
Zentrum fuer Informatikdienste, Wirtschaftsuniversitaet Wien, Austria
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