FWIW, I have the IDE version of that drive (or similar) I think its the
DVD-304 or something. And SELECT_SPEED does not work on it. It works fine
on the CDROM players I have, but not that one. It might be related to the
SCSI version, maybe the drive itself ignores it ?
I wanted to set the drive to the slowest speed so it does not sound like a
Harrier Jumpjet when I play MP3's. But no luck..
(This was on Linux 2.0)
-Bjorn
On Mon, 10 Jan 2000, Jens Axboe wrote:
> On Sun, Jan 09 2000, Harald Koenig wrote:
> > in the mean time I got some 3 more DVD (video) disks, and those discs
> > I can read with higher transfer rates!
> >
> > the two DVD9 discs (two layers, signle side) read up to 5.4 MB/sec (4x)
> > while the DVD5 disc (sigle layer, single side) went up to 6.85 MB/sec (5x).
>
> Nothing we can do about that, then. I suspect that this is usual,
> though I've never benched my DVD drives.
>
> > "drive speed" is always reported being 0 (zero). but looking at the
> > code in scsi/sr.c get_capabilities() only gets called once at boot time
>
> Pioneer does this. The capabilities page (where we read the speed)
> is deprecated, but most drive still report it.
>
> > code in scsi/sr.c get_capabilities() only gets called once at boot time
> > from sr_finish(), so it's no big surprise that the value
> > in /proc/sys/dev/cdrom/info doesn't change...
>
> sr_select_speed should set that, I'll fix it up.
>
> --
> * Jens Axboe <axboe@image.dk>
> * Linux CD-ROM Maintainer
> * http://www.kernel.dk
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