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SBP(4)			     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  de-
     tached  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 can-
     not  be  probed correctly for some reason after a bus reset or when the de-
     vice is temporary disconnected because the user changes the  bus  topology.
     If  you  want  to	force  to  detach the device, run "fwcontrol -r" several
     times.

     Some (broken) HDDs do not work well with tagged queuing.  If you have prob-
     lems 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 5.4			  May 20, 2002				  SBP(4)

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