NAME
sbp —
Serial Bus Protocol 2 (SBP-2) Mass
Storage Devices driver
SYNOPSIS
kldload firewire
kldload cam
kldload sbp
or
device sbp
device firewire
device scbus
device da
device cd
device pass
DESCRIPTION
Thesbp driver provides support for SBP-2 devices that
attach to the FireWire (IEEE 1394) port. It should work with SBP-2 devices
which the CAM layer supports, for example, HDDs, CDROM drives and DVD drives.
Some users familiar with
umass(4) might wonder why the device is not detached at the CAM layer
when the device is unplugged. It is detached only if the device has not been
plugged again during several bus resets. This is for preventing to detach an
active file system even when the device cannot be probed correctly for some
reason after a bus reset or when the device is temporary disconnected
because the user changes the bus topology. If you want to force to detach
the device, run “fwcontrol
-r” several times or set
hw.firewire.hold_count=0 by
sysctl(8).
Some (broken) HDDs do not work well with tagged queuing. If you
have problems with such drives, try “camcontrol
[device id] tags -N 1” to disable tagged queuing.
SEE ALSO
cam(4), firewire(4), camcontrol(8), fwcontrol(8), kldload(8), sysctl(8)
AUTHORS
The sbp driver was written by
Katsushi Kobayashi and Hidetoshi
Shimokawa.
This manual page was written by Katsushi Kobayashi.