NetBSD 6.1.5/amd64 and USB performance

[tlaronde%polynum.com@localhost]

Hello,

I have NetBSD 6.1.5 on a amd64 with USB 3.0 ports.

When writing files to an external USB (3.0) connected disk, using
ntfs-3g, the write performance is abyssal : it is only USB 1.0 (12
Mbps or 1.5MB/s).

What is the expected performance of the USB drivers on NetBSD ? Is 3.0
supported ? 2.0 ? Or only 1.0 ? Or is the ntfs-3g driver the culprit
here?---but I fail to see why it should depend on the way the device
where the filesystem resides is connected...

Thanks for informations,
-- 
        Thierry Laronde <tlaronde +AT+ polynum +dot+ com>
                     http://www.kergis.com/
                     http://www.arts-po.fr/
Key fingerprint = 0FF7 E906 FBAF FE95 FD89  250D 52B1 AE95 6006 F40C