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 or set hw.firewire.hold_count=0 by sysctl(8). 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. HARDWARE The sbp driver supports FireWire Serial Bus Protocol 2 (SBP-2) storage de- vices. 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 15.1 November 11, 2025 SBP(4)
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | SEE ALSO | AUTHORS
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