On Fri, 20 May 2005, Artur Szymiec wrote:

> Hello again Alan,
> 
> as You told me I patched the scsiglue.c for kernel 2.6.12-rc4
> and installed the kernel and modules.
> Unfortunately things went wrong - as previous I was unable
> to mount it. But again after some 10 trials system catched
> the player partialy and I was able to mount it and see directory list.
> The copy from or to player was impossible.
> Then a fatal thought came to me - let's try mkfs.vfat - the command
> completed without any error - except that:
> - during player turn on - complain on LCD - please reformat media !
> - from time to time I'm able to mount it and see directory - strange dir shows
>   some files inside the player !!!
> 
> Ok - I'm attaching logs - maybe You will be able to help or to say that's
> definitly the end of story ...and only Wingroze or trash can heal it ....:-)

The patch didn't help, obviously...  You're still getting these errors, 
and I still think they look like low-level hardware errors.

It wouldn't be surprising if the same errors occur when you use the player
with Windows -- maybe Windows is just better at recovering from the errors
when they occur.  It would be interesting to see a log of the Windows USB
activity.  It is possible for you to create such a log, using a program 
like usbsnoop.  See <http://sourceforge.net/projects/usbsnoop/>.

There is a patch to improve the error recovery in Linux.  However it will 
only apply to 2.6.12-4; it won't work with a 2.6.11 kernel.  Most likely 
that means you won't want to try it out until you have a lot more free 
time.

There's one other thing you can try easily.  Maybe the ub driver will work 
better than usb-storage.  You can find it in menuconfig under Device 
Drivers / Block devices / Low Performance USB Block Driver.  To use it all 
you have to do is rmmod usb-storage and modprobe ub.

Alan Stern



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