| UMASS(4) | Device Drivers Manual | UMASS(4) | 
umass —
USB mass storage support
umass* at uhub?
atapibus* at umass?
scsibus* at umass? channel ?
wd* at umass?
The umass driver provides support for USB mass storage
  class devices. The driver supports subclasses SCSI, 8020i (ATAPI), 8070i
  (ATAPI), QIC157 (ATAPI), RBC (subset of SCSI), and UFI (USB Floppy). The
  driver handles the protocols Bulk-Only, CBI, and CBI-with-CCI.
Devices known to work with this driver include:
  - Creative Tech NOMAD MuVo TX
-  
- FujiFilm FinePix1300 Digital Camera
-  
- Imation SuperDisk
-  
- IOmega Zip 100
-  
- IOmega Zip 250
-  
- Kingston DataTraveler 2.0
-  
- LaCie CD R/W
-  
- Lexar Media JumpDrive Flash Disks
-  
- Neodio Multi-format Flash Controller
-  
- Olympus C-5050 ZOOM Digital Camera
-  
- SanDisk ImageMate SDDR-31
-  
- Siemens MP3-Player USB
-  
- Sony DSC Digital Cameras
-  
- STMicroelectronics ST92163 Mass Storage library Tester
-  
- Y-E Data FlashBuster floppy
-  
 
The umass driver is a port of the
  FreeBSD driver. The umass
  driver appeared in NetBSD 1.5.
The driver has some support for certain adapters from In-System Design that use
  the (non-standardized) ATA protocol over Bulk-Only. This hardware is very
  rare, and the support very likely no longer works after ATA subsystem redesign
  to support NCQ on October 7, 2017.