Date: Thu, 4 Feb 1999 13:02:52 +0100 (CET) From: Oliver Fromme <olli@dorifer.heim3.tu-clausthal.de> To: freebsd-scsi@FreeBSD.ORG Subject: Re: od driver Message-ID: <199902041202.NAA05583@dorifer.heim3.tu-clausthal.de>
next in thread | raw e-mail | index | archive | help
J Wunsch wrote in list.freebsd-scsi:
> > I'm not sure, though that the cd9660 filesystem code can support
> > writes. You may have to use a standard ufs filesystem on the CD for
> > that. I just tried a few experiments to see if I could get a cd9660
> > filesystem to mount read-write (using the vn device), and I wasn't
> > able to get it to work.
>
> R/W mounting is probably not that big of a problem, but the entire
> driver is IMHO not written with the idea in mind that data on the
> medium might change at some point while the medium is mounted. So
> this will probably end up in a rewrite of the cd9660 driver.
The ISO9660 filesystem is not designed for writing, but only
for static data. It doesn't even support fragmentation of
files or appending to an existing file, AFAIR. So it's not
really feasible to add R/W support to the cd9660 driver.
For a DVD-RAM, the best thing right now is probably to use a
UFS, since we lack support for the native DVD-RAM filesystem
specification (I don't remember its name).
Regards
Oliver
--
Oliver Fromme, Leibnizstr. 18/61, 38678 Clausthal, Germany
(Info: finger userinfo:olli@dorifer.heim3.tu-clausthal.de)
"In jedem Stück Kohle wartet ein Diamant auf seine Geburt"
(Terry Pratchett)
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-scsi" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199902041202.NAA05583>