Messages in this thread | | | Date | Wed, 14 Nov 2007 10:09:22 -0500 | From | Mark Lord <> | Subject | Re: libata/PATA: GPCMD_SET_STREAMING via SG_IO does nothing |
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Sebastian Kemper wrote: > Hi Alan! > > On Tue, Nov 13, 2007 at 09:22:30PM +0000, Alan Cox wrote: >> It isn't a known issue, and it suprises me as SG_IO basically passes >> commands through to the drive. We don't support speed change via xfermode >> setting but GPCMD_SET_STREAMING sohuld behave. >> >> Do you have a simple code example that shows the problem ? > > http://svn.mplayerhq.hu/mplayer/trunk/stream/stream_dvd.c?view=markup > > See dvd_set_speed(). The drive I'm using is an Optiarc DVD RW AD-7170A. > With the "old" ATA driver dvd_set_speed() works, with libata it doesn't. ..
I think the problem here might be that libata doesn't actually support SG_IO for ATAPI drives prior to 2.6.24 (ugh).
Try it with a 2.6.24-rc* kernel from kernel.org, or back-patch the ATA_16 SG_IO support into your older kernel.
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