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UMASS(4)               FreeBSD Kernel Interfaces Manual               UMASS(4)

     umass - USB Mass Storage Devices driver

     device umass

     The umass driver provides support for Mass Storage devices that attach to
     the USB port.  Supported are:

     Iomega USB Zip 100 drive
     Iomega USB Zip 250 drive
     Microtech International, Inc. USB-SCSI-HD 50 USB to SCSI cable
     Panasonic ("Matshita FDD CF-VFDU03")
     Trek Thumbdrive 8MB
     VAIO floppy drive (includes Y-E Data Flashbuster-U)

     The driver also supports some USB adapters for removable media.  Among
     the supported models are:

     SanDisk SDDR-31 (Compact Flash)
     SanDisk SDDR-75 (only Compact Flash port works)
     Sitecom CN-300 MultiFlash (MMC/SD, SmartMedia, CF, MemoryStick)

     Among the supported digital cameras are:

     Asahi Optical (PENTAX) Optio 230 & 330

     usb and one of uhci or ohci must be configured in the kernel as well.
     Last but not least, support for SCSI drives, da.

           device umass
           device scbus
           device da
           device pass

     Add the umass driver to the kernel.

           camcontrol rescan 0

     Rescan a Zip drive that was added after boot.  The command above assumes
     that the Zip drive is on the first SCSI bus in the system.

           camcontrol rescan 0:0:0
           camcontrol rescan 0:0:1
           camcontrol rescan 0:0:2
           camcontrol rescan 0:0:3

     Rescan all slots on a multi-slot flash reader, where the slots map to
     separate LUNs on a single SCSI ID.  Typically only the first slot will be
     enabled at boot time.  Again, this assumes that the flash reader is the
     first SCSI bus in the system.

           bsdlabel -w da0 zip100
           newfs da0c
           mount -t ufs /dev/da0c /mnt

     Write a disklabel to the Zip drive (see vpo for the disktab entry),
     creates the file system and mounts the new file system on /mnt.

           newfs_msdos /dev/da0

     Create a new FAT type file system.

     ohci(4), uhci(4), usb(4), vpo(4), disktab(5), camcontrol(8), bsdlabel(8)

     The umass driver was written by MAEKAWA Masahide <>
     and Nick Hibma <>.

     This manual page was written by Nick Hibma <>.

FreeBSD 11.0-PRERELEASE           May 3, 1999          FreeBSD 11.0-PRERELEASE


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