usb recognition difference between 9 and 10-STABLE

[Hayata]

Hi. My usb digital audio player is recognized by FreeBSD9.1's device system
as /dev/da0 (internal memory) and as /dev/da1 (SD card). But I found
10-STABLE no longer recognize /dev/da1 and only /dev/da0 appears in /dev.
Does anyone know why? How should I do if I want to access /dev/da1?

I attached `uname` and /var/log/messages in the following.

Regards,
--
Takahiro Hayata
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%uname -a
FreeBSD spike2x.klab 10.0-STABLE FreeBSD 10.0-STABLE #0 r262690: Mon Mar  3 02:18:49 JST 2014     hayata at akeldam.klab:/usr/obj/opt/src/sys/GENERIC  amd64
%cat /var/log/messages
...
Mar  4 12:45:35 spike2x kernel: ugen7.2: <Transcend> at usbus7
Mar  4 12:45:35 spike2x kernel: umass0: <Mass Storage> on usbus7
Mar  4 12:45:35 spike2x kernel: umass0:  8070i (ATAPI) over Bulk-Only; quirks = 0x0000
Mar  4 12:45:35 spike2x kernel: umass0:5:0:-1: Attached to scbus5
Mar  4 12:45:35 spike2x kernel: da0 at umass-sim0 bus 0 scbus5 target 0 lun 0
Mar  4 12:45:35 spike2x kernel: da0: <MP 870 0100> Removable Direct Access SCSI-0 device 
Mar  4 12:45:35 spike2x kernel: da0: Serial Number K
Mar  4 12:45:35 spike2x kernel: da0: 40.000MB/s transfers
Mar  4 12:45:35 spike2x kernel: da0: 7672MB (15712256 512 byte sectors: 255H 63S/T 978C)
Mar  4 12:45:35 spike2x kernel: da0: quirks=0x2<NO_6_BYTE>
Mar  4 12:45:35 spike2x kernel: da1 at umass-sim0 bus 0 scbus5 target 0 lun 1
Mar  4 12:45:35 spike2x kernel: da1: <MP 870 0100> Removable Direct Access SCSI-0 device 
Mar  4 12:45:35 spike2x kernel: da1: Serial Number K
Mar  4 12:45:35 spike2x kernel: da1: 40.000MB/s transfers
Mar  4 12:45:35 spike2x kernel: da1: 29979MB (61396992 512 byte sectors: 255H 63S/T 3821C)
Mar  4 12:45:35 spike2x kernel: da1: quirks=0x2<NO_6_BYTE>
Mar  4 12:45:35 spike2x kernel: da1 at umass-sim0 bus 0 scbus5 target 0 lun 1
Mar  4 12:45:35 spike2x kernel: da1: <MP 870 0100> s/n K detached
Mar  4 12:45:35 spike2x kernel: (da1:umass-sim0:0:0:1): Periph destroyed
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%uname -a
FreeBSD aerfax5.klab 9.1-STABLE FreeBSD 9.1-STABLE #17 r249542: Tue Apr 16 18:26:06 JST 2013     hayata at akeldam.klab:/usr/obj/opt/src/sys/AKELDAM  amd64
%cat /var/log/messages
...
Mar  4 13:33:12 aerfax5 kernel: ugen7.2: <Transcend> at usbus7
Mar  4 13:33:12 aerfax5 kernel: umass0: <Mass Storage> on usbus7
Mar  4 13:33:12 aerfax5 kernel: umass0:  8070i (ATAPI) over Bulk-Only; quirks = 0x0000
Mar  4 13:33:12 aerfax5 kernel: umass0:6:0:-1: Attached to scbus6
Mar  4 13:33:12 aerfax5 kernel: da0 at umass-sim0 bus 0 scbus6 target 0 lun 0
Mar  4 13:33:12 aerfax5 kernel: da0: <MP 870 0100> Removable Direct Access SCSI-0 device 
Mar  4 13:33:12 aerfax5 kernel: da0: 40.000MB/s transfers
Mar  4 13:33:12 aerfax5 kernel: da0: 7672MB (15712256 512 byte sectors: 255H 63S/T 978C)
Mar  4 13:33:12 aerfax5 kernel: da1 at umass-sim0 bus 0 scbus6 target 0 lun 1
Mar  4 13:33:12 aerfax5 kernel: da1: <MP 870 0100> Removable Direct Access SCSI-0 device 
Mar  4 13:33:12 aerfax5 kernel: da1: 40.000MB/s transfers
Mar  4 13:33:12 aerfax5 kernel: da1: 29979MB (61396992 512 byte sectors: 255H 63S/T 3821C)
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