[Bug 208365] [umass] Cannot fsck 3TB USB disk

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208365

--- Comment #18 from Hans Petter Selasky <hselasky at FreeBSD.org> ---
PHK: If you check with usbconfig that the disk is attached to XHCI and not
EHCI, then no bouncing will happen. XHCI is 64-bit while EHCI is 32-bit. There
are a few XHCI quirks for 32-bit. See xhci_pci.c

PHK: If your disk was attached to XHCI, then there might be more bugs in the
segment list computations, which make them discontiguous.

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