Re: libata/PATA: GPCMD_SET_STREAMING via SG_IO does nothing

[Mark Lord]

Sebastian Kemper wrote:
> On Wed, Nov 14, 2007 at 11:26:06AM -0500, Mark Lord wrote:
> > Another way to the same thing is with "hdparm -E",
> > which contrary to my earlier posting actually does
> > seem to work already with libata.
>
> Hi!
>
> There are DVD-ROM drives that don't react to hdparm -E but do react to
> SET_STREAMING, for instance some NEC drives.
..

Mmm.. that's possible.  The NEC drive I have here works with either.

I wonder if an update to sr_select_speed() (inside the SCSI code) is needed?
It currently uses GPCMD_SET_SPEED, with no fallback to GPCMD_SET_STREAMING.

Or I suppose this is best left to userspace.
I may change hdparm to try both opcodes.
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