Pocketの手を使って、USB接続をマスストレージに設定すると、WindowsでもLinuxでも、miniSDカード部分がストレージとして見えるのを確認。
GenericDeviceということになるみたいです。
dmesg の中身はこんな感じ
hub.c: new USB device 00:0d.1-1, assigned address 3
usb.c: USB device 3 (vend/prod 0x45e/0xffff) is not claimed by any active driver.
SCSI subsystem driver Revision: 1.00
Initializing USB Mass Storage driver...
usb.c: registered new driver usb-storage
scsi0 : SCSI emulation for USB Mass Storage devices
Vendor: Model: Rev:
Type: Direct-Access ANSI SCSI revision: 02
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 3
USB Mass Storage support registered.
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
SCSI device sda: 1935360 512-byte hdwr sectors (991 MB)
sda: Write Protect is off
sda: sda1
