umass mount woes

I got a new whiz-bang mp3 play from SanDisk. I went
with SanDisk because they have always worked so well
with non-windows for me.

Anyway, I'm having a bit of a problem mounting it.
Other umass devices work fine on my system. Any help
will be appreciated. The device is a Sansa c240. as a
usb device, it doesn't default to umass behavior; but
it can be set to behave that way. I have set the
device USB mode to MSC mode.

Some sample system behavior:

[root_at_carmen ~]# uname -a
FreeBSD carmen.opera 7.0-CURRENT FreeBSD 7.0-CURRENT
#0: Wed Nov 29 22:46:47 MST 2006    
root_at_carmen.opera:/usr/obj/usr/src/sys/CARMEN  i386

... so I plug in a jump drive. Stdout shows:

umass0: <LEXAR MEDIA JUMPDRIVE, class 0/0, rev
2.00/30.00, addr 2> on uhub2
(probe0:umass-sim0:0:0:0): Uninitialized Transport
5:e44a4b24?
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <LEXAR JUMPDRIVE 1000> Removable Direct Access
SCSI-0 device 
da0: 40.000MB/s transfers
da0: 991MB (2030592 512 byte sectors: 64H 32S/T 991C)

Now I can do the following:
[root_at_carmen ~]# mount -t msdos /dev/da0s1 /mnt
[root_at_carmen ~]# mount
/dev/ad4s1a on / (ufs, local)
devfs on /dev (devfs, local)
/dev/ad4s1e on /tmp (ufs, local, soft-updates)
/dev/ad4s1f on /usr (ufs, local, soft-updates)
/dev/ad4s1d on /var (ufs, local, soft-updates)
/dev/da0s1 on /mnt (msdosfs, local)
[root_at_carmen ~]# umount /mnt

... I then unplug that device and plug in the mp3
player. Stdout:
umass0: <SanDisk Sansa c240, class 0/0, rev 2.00/7.20,
addr 2> on uhub2
(probe0:umass-sim0:0:0:0): Uninitialized Transport
5:c412049c?
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <SanDisk Sansa c240 Sans> Removable Direct Access
SCSI-0 device 
da0: 40.000MB/s transfers
da0: 979MB (2006528 512 byte sectors: 64H 32S/T 979C)
(probe0:umass-sim0:0:0:1): Uninitialized Transport
5:c045de9c?
da1 at umass-sim0 bus 0 target 0 lun 1
da1: <SanDisk Sansa c240 Sans> Removable Direct Access
SCSI-0 device 
da1: 40.000MB/s transfers
da1: Attempt to query device size failed: NOT READY,
Medium not present
(da1:umass-sim0:0:0:1): READ CAPACITY. CDB: 25 20 0 0
0 0 0 0 0 0 
(da1:umass-sim0:0:0:1): CAM Status: SCSI Status Error
(da1:umass-sim0:0:0:1): SCSI Status: Check Condition
(da1:umass-sim0:0:0:1): NOT READY asc:3a,0
(da1:umass-sim0:0:0:1): Medium not present
(da1:umass-sim0:0:0:1): Unretryable error
Opened disk da1 -> 6
(da1:umass-sim0:0:0:1): READ CAPACITY. CDB: 25 20 0 0
0 0 0 0 0 0 
(da1:umass-sim0:0:0:1): CAM Status: SCSI Status Error
(da1:umass-sim0:0:0:1): SCSI Status: Check Condition
(da1:umass-sim0:0:0:1): NOT READY asc:3a,0
(da1:umass-sim0:0:0:1): Medium not present
(da1:umass-sim0:0:0:1): Unretryable error
Opened disk da1 -> 6
(da1:umass-sim0:0:0:1): READ CAPACITY. CDB: 25 20 0 0
0 0 0 0 0 0 

So I then attempt to mount it:

[root_at_carmen ~]# mount -t msdos /dev/da0s1 /mnt
mount_msdosfs: /dev/da0s1: Invalid argument
[root_at_carmen ~]# mount -t msdos /dev/da1 /mnt
mount_msdosfs: /dev/da1: Device not configured
[root_at_carmen ~]# mount -t msdos /dev/da0 /mnt
mount_msdosfs: /dev/da0: Invalid argument
[root_at_carmen ~]# ls /dev/da*
/dev/da0        /dev/da0s1      /dev/da0s2     
/dev/da1
[root_at_carmen ~]# mount -t msdos /dev/da0s1 /mnt
mount_msdosfs: /dev/da0s1: Invalid argument

...

any ideas?
Thanks for checking out my plight.

-N


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