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| SBP(4) | FreeBSD Kernel Interfaces Manual | SBP(4) |
NAME
sbp —
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
Thesbp driver was written by Katsushi
Kobayashi and Hidetoshi Shimokawa.
This manual page was written by Katsushi Kobayashi.
| February 8, 2012 | FreeBSD 13.1-RELEASE |
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