On Fri, 11 Jan 2008, sean darcy wrote:

> Alan Stern wrote:

> > I wouldn't be so quick to assume it's working right.  Notice in the 
> > messages above: "full speed".  You don't want to operate a 500 GB drive 
> > at full speed.
> > 
> > This doesn't explain why the drive failed to work at full speed in your
> > earlier test, though.  Whatever the reason, you should verify that it
> > really does work at high speed.
> > 
> > Alan Stern
> > 
> 
> I didn't have ehci_hcd loaded. Now it shows high speed:
> 
> ............
> Jan 11 18:53:22 testbox kernel: usb 1-3: new high speed USB device using 
> ehci_hcd and address 2
> Jan 11 18:53:22 testbox kernel: usb 1-3: configuration #1 chosen from 1 
> choice
> Jan 11 18:53:22 testbox kernel: scsi8 : SCSI emulation for USB Mass 
> Storage devices
> Jan 11 18:53:27 testbox kernel: scsi 8:0:0:0: Direct-Access     WD 
>   4000YS External  101a PQ: 0 ANSI: 4
> ........
> 
> But how do you "verify" high speed? hdparm?

You verify it by (1) making sure the log says "high speed" (which it
does; see above) and (2) checking that the drive really does work.

Alan Stern

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