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 <
[email protected]>
and Nick Hibma <
[email protected]>.
This manual page was written by Nick Hibma <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 January 27, 2020 FreeBSD 14.1-RELEASE-p8