Date: Fri, 15 Oct 2004 14:07:14 +0200 From: Jose M Rodriguez <josemi@freebsd.jazztel.es> To: freebsd-current@freebsd.org Cc: Chuck Swiger <cswiger@mac.com> Subject: Re: atapicam(4) as KLD? Message-ID: <200410151407.15115.josemi@freebsd.jazztel.es> In-Reply-To: <20041015100633.GA45863@cirb503493.alcatel.com.au> References: <20041013205141.GA874@galgenberg.net> <416EE19D.50400@mac.com> <20041015100633.GA45863@cirb503493.alcatel.com.au>
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El Viernes, 15 de Octubre de 2004 12:06, Peter Jeremy escribi=F3:
> On Thu, 2004-Oct-14 16:29:17 -0400, Chuck Swiger wrote:
> >Is burncd able to burn a DVD [+/-{R,W,RAM}] to an IDE device without
> > using ATAPICAM?
>
> dd(1) does a reasonable job of burning pre-formatted DVD+RWs. I
> would expect it to handle DVD-RAM but I'm not sure about write-once
> media.
>
> > I think it is not unreasonable to expect the GENERIC kernel to
> >be able to burn DVDs, as that can make for a reasonable backup
> > mechanism.
>
> I tend to agree. For some time, FreeBSD has been heading away from
> requiring users to re-compile the kernel. If ATAPICAM can't be
> (readily) turned into a module, it would seem reasonable to have it
> built into GENERIC.
>
> Whilst we're discussing ATAPICAM, even after I make /dev/cd0[ac] mode
> 666, I can't write to it as a non-root user. Does anyone know the
> rationale for this and which particular EPERM is the culprit? I've
> had a quick look at the source but can't see nothing leapt out.
>
unless you need things like k3b (-l cam), IMHO the best aproach must be=20
create some system groups (cdrom, cdrw) and make apps like cdrecord=20
setuid root (or operator) and group (not world) executable.
> >[ Peripheral note: DVDs are OK for backup, that is, but I much
> > prefer tapes for durability and long term storage. Quantum sDLT
> > 220 drives rock. ]
>
> I can buy a DVD writer for about USD100. An SDLT drive is about two
> orders of magnitude more expensive. Likewise, the media is around
> two orders of magnitude more expensive. In $/GB, DLT is only 2-3
> times as expensive but the capital cost is somewhat of a killer.
And about four orders of magnitude more reliable.
Also, size is a factor. With 160 GB HD out there, 40/80 GB medium=20
capacity maybe a real need.
=2D-
josemi
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