>>328
> umass0: TEAC IBM USB CD-ROM Drive, rev 1.10/1.34, addr 3
> GEOM: create disk cd0 dp=0xc35cae00
> cd0 at umass-sim0 bus 0 target 0 lun 0
> cd0: <IBM USB CD-ROM 20B4> Removable CD-ROM SCSI-0 device
> cd0: 1.000MB/s transfers
> cd0: cd present [7154 x 2048 byte records]
> umass0: Unsupported ATAPI command 0x43

ttp://www.clave.gr.jp/ml/bsd-usb/200311/msg00004.html
↑これと状況が似てるので、同じようにATAPIではなくSCSIを使うパッチを
作ってやれば動くかも。