usb key problem

Polytropon freebsd at
Thu Oct 15 23:26:13 UTC 2009

On Thu, 15 Oct 2009 18:19:16 -0400, PJ <af.gourmet at> wrote:
> I am running 7.2 but cannot properly attach/detach cruze 8gb and 4gb USB
> keys.
> When inserted, generate errors:
> da0 seems to be read correctly
> but then comes arow of
> (probe0:umass-sim0:0:0:1): snip CAM Status: SCSI Status Error
> snip NOT READY asc:3a,0
> Medium not present
> Unretryable error
> then
> cd0 at umass-sim0 dada,dada,dada
> attempt to query device size failed; UNIT ATTENTION, Not ready to ready
> change, medium may have changed
> # camcontrol devlist
> <SanDisk U3 Cruzer Micro 4.04> at scbus1 target 0 lun 0 (da0,pass0)
> same as above ----- ---------------------------   lun 1 (pass1,cd0)

It would be good if you provide the full dmesg lines that
are corresponding with this problem.

By the way, I had problems with "defective by design" SanDisk
USB sticks, too. This is how it looked:

% dmesg | tail
umass0: <SanDisk Cruzer Micro, class 0/0, rev 2.00/2.00, addr 2> on uhub2
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <SanDisk Cruzer Micro 8.02> Removable Direct Access SCSI-0 device 
da0: 40.000MB/s transfers
da0: Attempt to query device size failed: UNIT ATTENTION, Medium not present
umass0: at uhub2 port 2 (addr 2) disconnected
(da0:umass-sim0:0:0:0): lost device
(da0:umass-sim0:0:0:0): removing device entry
umass0: detached

I could not access the stick, /dev/da0 was the only device
that appeared, and I could only dump the partition table
(in terms of "DOS primary partitions", i. e. slices) with
the "fdisk da0" command. But I could not access it.

Finally, I printed out dmesg on a line printer (looks very
impressing), marked the lines shown above and returned it to
the shop. I'm now happy with a Sony USB stick which works

> Something is not functioning & I don't understand. It did function a
> while (some weeks) ago but now, no go...

It did function, and now no more? I would say that if you didn't
change anything on your system, the SanDisk stick is broken.

Could you try the stick in another system for reference?

> I did look on the web, but...
> ????

Did you see a spider that made the web? :-)

Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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