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¶
The
sbp
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.