On 02/01/2012 11:41 PM, Stefan Richter wrote: > On Feb 01 Andy Grover wrote: >> You're saying the sbp2 protocol can theoretically be used other places >> besides firewire? I'd say put it all in the fabric module for now. > > While SBP-2 is explicitly specified for IEEE 1394 a.k.a. FireWire only, > it could be used on any bus architecture which implements IEEE 1212 > "Control and Status Registers (CSR) Architecture for Microcomputer > Buses". But IEEE 1394 a.k.a. FireWire is nowadays the only remaining IEEE > 1212 implementation, as far as I know. > > On the other hand, the transport protocol SBP-2 can be used to encapsulate > various protocols besides SCSI. A long time ago I heard that there were > SBP-2 printers that weren't SCSI printers, but I may have confused > something. > Hmm Interesting. So what do the other FireWire protocols use, like networking, DV video, audio? they have yet another encapsulating transport other than SBP-2? What a mess > The current version of the protocol, SBP-3 which extends SBP-2 > in an upwards compatible way, has been developed specifically in > order to transport AV/C command sets. (AV/C is a set of specifications > from the 1394 Trade Association that build on top of IEC 61883 "Consumer > audio/video equipment - Digital interface" and is used for camcorders, > audio interfaces, studio-grade video equipment, TV set top boxes etc.) > But I am not aware of any existing SBP-3 target or SBP-3 initiator which > actually implements AV/C. > > So in short, > - SBP-2/3 is only used on the FireWire bus. > - Potentially there could be SBP-2/3 targets or initiators that > implement something else than SCSI. But stock SBP-2/3 initiator > drivers of popular OSs are SCSI initiators, and non-SCSI SBP-2/3 > targets are extremely rare or don't exist actually. Thanks that was informative I'll have a deeper look Boaz -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
