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

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>.

FreeBSD	13.0		       January 27, 2020			  FreeBSD 13.0

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | AUTHORS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=umass&sektion=4&manpath=FreeBSD+13.0-RELEASE+and+Ports>

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