I have a Corsair Flash Voyager GT and a Lenovo x220 running Fedora's 3.8.2 kernel. It doesn't work very well, and the problems vary depending on whether I'm using usb2 or usb3. - On usb3, the device node can't be opened with O_DIRECT (using, for example, dd oflag=direct). It returns -EINVAL. (On usb2, O_DIRECT works.) - Also on usb3, if I dd if=/dev/zero of=/dev/sdb bs=1M, dd finishes in a second or two and no I/O occurs. This system only has 2GB of RAM -- caching shouldn't be that extreme. On either usb version, if I mount an NTFS partition and write a few GB of data, I get tons of buffer I/O errors. The point at which they happen varies, but this is entirely repeatable. Oddly, dd if=/dev/zero of=/dev/sdc oflag=direct bs=1M works fine and successfully zeroes the whole device. Other computers (running Windows or OS X) seem fine with this USB stick. I don't think the stick is bad. Any ideas? --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
