Re: System hanging, error messages with USB drive on FreeBSD 8.1
At 11:43 PM 8/27/2011, Polytropon wrote: I'm not sure if this will help you, but I also had similar problems with a Kingston USB stick (normal storage stick, no removable microSD card). It didn't work on any of my FreeBSD systems. So I finally returned it to the shop and got a Sony USB stick instead - no problems, works fine. So this is my assumption: Some hardware vendors maybe improperly implement the USB protocol in their devices, A Web search reveals that there are dozens which apparently have problems with FreeBSD, while Windows has problems with none of them. This leads me to believe that the problem is in FreeBSD, not the hardware. USB mass storage devices are, for some reason, handled by FreeBSD's SCSI/CAM subsystem, which seems to want to treat a USB storage device (a memory stick or a memory card in an adapter) as a full-out SCSI device when it is not. The SCSI commands which fail usually have to do with flushing the cache and/or other functions which just don't apply to a USB stick. It looks as if the devices which do not have trouble are just IGNORING the SCSI commands, not executing them. In short, FreeBSD really should not be trying to issue them in the first place. In short, this shouldn't be something that's handled by quirks. Instead, the system simply should recognize that a USB memory stick is not a SCSI drive. --Brett Glass ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: System hanging, error messages with USB drive on FreeBSD 8.1
On 8/28/2011 11:20 AM, Brett Glass wrote: At 11:43 PM 8/27/2011, Polytropon wrote: I'm not sure if this will help you, but I also had similar problems with a Kingston USB stick (normal storage stick, no removable microSD card). It didn't work on any of my FreeBSD systems. So I finally returned it to the shop and got a Sony USB stick instead - no problems, works fine. So this is my assumption: Some hardware vendors maybe improperly implement the USB protocol in their devices, A Web search reveals that there are dozens which apparently have problems with FreeBSD, while Windows has problems with none of them. This leads me to believe that the problem is in FreeBSD, not the hardware. The vendors most probably write their own drivers for windows. They do not for FreeBSD and its best effort for FreeBSD. I have yet to come across a USB umass device that needs a quirks setting to make it work. But I am sure there are many out there as there are dozens of different vendors/OEMs out there of all sorts of quality. Having to deal with the edge cases using a single command is perfectly acceptable to me. If setting a quirks value for FreeBSD is not workable for you, perhaps Windows is a better choice for your use. ---Mike -- --- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, m...@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
