Re: Unusual dev addition for memory stick?

Hi Alan,

Do you think the SYBA hub (Genesys Logic, 05e3:0606) is that bad? 

I tried TEAC (Trek Technology, 0a16:9005) sticks, which work fine in the
SYBA hub, and also another unknown brand (0204:6025), which worked fine also
in the hub.

What is very strange also, if I write data to the stick (if it works), it
seems to work better after that, that's why I also thought of the residual
bytes.

Best regards,
Marco



> -----Original Message-----
> From: Alan Stern [mailto:[email protected]]
> Sent: Thursday, May 03, 2007 4:07 PM
> To: Marco Polet
> Cc: '[email protected]'
> Subject: RE: Unusual dev addition for memory stick?
> 
> 
> On Thu, 3 May 2007, Marco Polet wrote:
> 
> > Hello Alan,
> > 
> > Thanks for your reply. The errors I got was during a dd 
> read of the complete
> > device. If I put the stick in another brand hub or directly 
> on the back of
> > the PC (ASUS P5B motherboard), the entire stick is read 
> without problems,
> > but if I put it in a SYBA SD-U2HUB-4 hub, I get the errors 
> in the previous
> > post. Is there anything I can do to get it to work on these 
> SYBA hubs? I've
> > got about 150 of them :-) I tried limiting max_sectors to 
> 36, but this did
> > not result in much better results.
> 
> Too bad you didn't mention that hub in your original posting.  :-(
> 
> You can try using different USB cables to attach the hub.  Apart from 
> that, I don't know of anything you can do.
> 
> Well, there is one thing -- but it's awkward and you probably 
> won't want
> to do it.  In 2.6.21 it's possible to force the high-speed 
> hub to run at
> full-speed.  Then the stick would probably work okay, but it 
> would be 40
> times slower.  As would every other high-speed device plugged 
> into that
> hub.
> 
> Alan Stern
> 

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