UW2 cards don't like to run at UW2?

[Bernd Walter]

On Mon, Aug 11, 2003 at 07:25:30PM -0500, Josh Tolbert wrote:
> On Sun, Aug 10, 2003 at 12:04:31AM +0200, Sten wrote:
> > On Fri, 8 Aug 2003, David O'Brien wrote:
> > 
> > > > da0 at sym1 bus 0 target 3 lun 0
> > > > da0: <SEAGATE ST318203LW 0002> Fixed Direct Access SCSI-2 device
> > > > da0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled
> > > > da0: 17366MB (35566480 512 byte sectors: 255H 63S/T 2213C)
> > >
> > > You've checked termination, cables, etc..?  I wonder if there is
> > > something in your card's option ROM that isn't getting set on the Alpha
> > > vs. i386.
> > >
> > > Maybe try just one drive at a time?
> > 
> > Just a stupid question, but have you tried playing
> > with camcontrol ? aka something like this :
> > 
> > #Set symbios to U2W
> > /sbin/camcontrol negotiate pass0 -R 40
> > 
> > ( works on my 164sx )
> > 
> > -- 
> > Sten Spans
> 
> Well, after much testing I still have no luck. I've tried using
> camcontrol to force the drives to 40MHz with
> 
> camcontrol negotiate pass0 -R 40 -a
> Current Parameters:
> (pass0:sym1:0:3:0): sync parameter: 12
> (pass0:sym1:0:3:0): frequency: 20.000MHz
> (pass0:sym1:0:3:0): offset: 15
> (pass0:sym1:0:3:0): bus width: 16 bits
> (pass0:sym1:0:3:0): disconnection is enabled
> (pass0:sym1:0:3:0): tagged queueing is enabled
> New Parameters:
> (pass0:sym1:0:3:0): sync parameter: 12
> (pass0:sym1:0:3:0): frequency: 20.000MHz
> (pass0:sym1:0:3:0): offset: 15
> (pass0:sym1:0:3:0): bus width: 16 bits
> (pass0:sym1:0:3:0): disconnection is enabled
> (pass0:sym1:0:3:0): tagged queueing is enabled
> 
> but have had no luck. camcontrol still sees the drives (same thing
> happens for pass1) running at 20MHz.

Check if *everything* on the bus including cables and terminators is
U2.
Any single ended device on the bus and it completely fall back to
Ultra Speed.

-- 
B.Walter                   BWCT                http://www.bwct.de
ticso at bwct.de                                  info at bwct.de