NAME

       umass — USB Mass Storage Devices driver

SYNOPSIS

       To compile this driver into the kernel, place the following line in your kernel configuration file:

             device scbus
             device usb
             device umass

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             umass_load="YES"

DESCRIPTION

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

       To use the umass driver, usb(4) and one of uhci(4) or ohci(4) or ehci(4) or xhci(4) must be configured in
       the  kernel.   Additionally,  since umass uses the SCSI subsystem and sometimes acts as a SCSI device, it
       requires da(4) and scbus(4) to be included in the kernel.

EXAMPLES

             device umass
             device scbus
             device da
             device pass

       Add the umass driver to the kernel.

             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.  This assumes that the flash reader is the
       first SCSI bus in the system and has 4 slots.

SEE ALSO

       cfumass(4), ehci(4), ohci(4), uhci(4), usb(4), xhci(4), camcontrol(8)

AUTHORS

       The  umass  driver  was  written   by   MAEKAWA   Masahide   <bishop@rr.iij4u.or.jp>   and   Nick   Hibma
       <n_hibma@FreeBSD.org>.

       This manual page was written by Nick Hibma <n_hibma@FreeBSD.org>.

Debian                                          January 27, 2020                                        UMASS(4)