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Command: sbp | Section: 4 | Source: FreeBSD | File: sbp.4.gz
SBP(4) FreeBSD Kernel Interfaces Manual SBP(4)
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.
FreeBSD 14.1-RELEASE-p8 February 8, 2012 FreeBSD 14.1-RELEASE-p8