Aug 16 20:22:59 host kernel: usb-storage: -- transfer complete
Aug 16 20:22:59 host kernel: usb-storage: Bulk command transfer result=0
Aug 16 20:22:59 host kernel: usb-storage: Attempting to get CSW...
Aug 16 20:22:59 host kernel: usb-storage: usb_stor_bulk_transfer_buf:
xfer 13 bytes
Aug 16 20:22:59 host kernel: usb-storage: Status code 0; transferred 13/13
Aug 16 20:22:59 host kernel: usb-storage: -- transfer complete
Aug 16 20:22:59 host kernel: usb-storage: Bulk status result = 0
Aug 16 20:22:59 host kernel: usb-storage: Bulk Status S 0x53425355 T
0x5c33 R 0 Stat 0x0
Aug 16 20:22:59 host kernel: usb-storage: scsi cmd done, result=0x0
Aug 16 20:22:59 host kernel: usb-storage: *** thread sleeping.

What's going on here?  Why all these usb-storage messages?