neese@adaptx1.UUCP (11/03/90)
>/* ---------- "Number of devices for SCSI-1" ---------- */ > >The SCSI standard says that you can have 8 devices on the bus with >addresses 0-7. Practically, does anyone really use more than 5 (1 initiator and >4 targets for example.)? Are there there any electrical reasons beyond >cable length that you can't have more than 5 ?? I've had people tell me >that 1 initiator and 4 targets is the practical limit and I'm trying find >out the real answer. There are no electrical reasons why one couldn't have 7 targets on the SCSI bus. The only issue I can see (not really an issue) is having a system that can keep all the devices busy. We regularly test with 7 targets in our labs and don't see any problems. The only things I have run into, is mixing some manufacturers with others. Some targets have thier own ideas about arbitration for the bus. This can cause some grief. But if your careful about the manufacturer you choose, there should be no problem. Roy Neese Adaptec Senior SCSI Applications Engineer UUCP @ uunet!utacfd!cs.utexas.edu! {nominil,merch,cpe}!adaptex!neese uunet!mlite!adaptex!neese