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- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Jan 15 2000 - 21:00:15 EST