Messages in this thread | | | Date | Mon, 10 Jan 2000 00:41:33 -0500 | From | Jens Axboe <> | Subject | Re: how to set DVD read speed for Pioneer DVD-303S ? |
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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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