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Re: USB umass hard drive "failed to create xfers" when attaching (Paul Goyette) writes:

>available.  The concensus on IRC is that this is a bug in the xhci(4)

xhci could support scatter/gather transfers to multiple smaller buffers
to mitigate the problem, so far only ehci(4) does this. But some hardware
wouldn't support it unless you switch to PIO transfers and it doesn't
fully solve the problem.

                                Michael van Elst
                                "A potential Snark may lurk in every tree."

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