Re: Is controlling DVD speeds via SET_STREAMING supported?

[Jens Axboe <axboe@suse.de>]

On Sun, Nov 28 2004, Pasi Savolainen wrote:
> On Sun, 28 Nov 2004 19:53:30 +0100, Jens Axboe <axboe@suse.de> wrote:
> > > (under 2.6.10-rc2-mm1)
> > > I ran speed-1.0 program as root and also modified to open the device
> > > file as O_RDWR. This didn't help, it still reports same error.
> > 
> > Ehm I don't see how that is possible, since that kernel definitely
> > contains SET_STREAMING as a write safe command. Are you 110% sure you
> > are running the kernel you think you are?
> 
> I was talking about 'feature not suppoerted by device' -error.
> Got uptodate to 2.6.10-rc2-mm3, ran following:
> - -
> tienel:~# whoami
> root
> tienel:~# uname -a
> Linux tienel 2.6.10-rc2-mm3 #1 SMP Sun Nov 28 22:28:17 EET 2004 i686 GNU/Linux
> tienel:~# wget -q http://noto.de/speed/speedcontrol.c
> tienel:~# gcc -o speedcontrol speedcontrol.c 
> tienel:~# ./speedcontrol -x 1 /dev/dvd
> Command failed: b6 00 00 00 00 00 00 00 00 00 1c 00  - sense: 05.20.00
> ERROR.
> tienel:~# tail /var/log/messages
> ...
> Nov 28 22:50:04 tienel kernel: hdb: packet command error: status=0x51
> { DriveReady SeekComplete Error }
> Nov 28 22:50:04 tienel kernel: hdb: packet command error: error=0x54
> Nov 28 22:50:04 tienel kernel: ide: failed opcode was 100

Makes more sense, then. It looks like you drive just isn't very happy
with the set streaming command. First I'd try to correct the end_lba of
the command, that might be it.

-- 
Jens Axboe