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SubjectRe: [PATCH] JMicron JM20337 USB-SATA data corruption bugfix - device 152d:2338
On Tue, 2 Sep 2008, Thiago Galesi wrote:

> Ok, I've created a USBMON log, here it is here:
> http://duskblue.org/jmicron_log_k3b.log
>
> (I guess it is a little too big - 70k - to be placed in the message directly)
>
> Using k3b, since it seems it is the program which causes more errors.
> DVD is completely unusable after I did this, dmesg has sr 4:0:0:0:
> rejecting I/O to offline device
>
> If I reload the drivers manually I have the reader back without
> rebooting the machine.

I can't tell exactly what's happening, but your device is sending back
a lot of error messages (Not Ready - Medium not present). Maybe it
doesn't recognize the type of disc you have loaded.

Also, there appears to be some program querying the state of your
device 7 or 8 times every two seconds. I can't tell what that is; it
might be hal or it might be your k3b program.

However what finally caused the failure was a command (0xAC) which I
don't recognize and apparently your drive doesn't recognize either.

Alan Stern



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