USB no proper work

[Alexander Panyushkin]

17.08.2013 19:41, Alexander Motin пишет:
> On 17.08.2013 09:22, Hans Petter Selasky wrote:
>> On 08/16/13 22:38, Alexander Panyushkin wrote:
>>> ========This deatach==========
>>> Aug 16 23:24:05 scorpion kernel: ugen1.2: <Generic> at usbus1
>>> (disconnected)
>>> Aug 16 23:24:05 scorpion kernel: umass0: at uhub0, port 4, addr 2
>>> (disconnected)
>>> Aug 16 23:24:05 scorpion kernel: (da0:umass-sim0:0:0:0): lost device 
>>> - 0
>>> outstanding, 2 refs
>>
>> Hi,
>>
>> The 2 refs is a problem that someone is keeping the device opened.
>> That's the problem and that's what is stopping the enumeration thread.
>
> 2 refs may be not a CAM bug. One of them can be GEOM reference and 
> another is open device reference. What were the file systems on the 
> device and were they active/mounted during detach?
>
> Just recently I tested hot-plug device with ZFS on 10-CURRENT using 
> USB sticks and found no problems in either CAM or USB stack around 
> device disconnect.
>

On USB device  FAT-32 file system.  When I removed flash drive, the file 
system has been unmounted.