Hello
I live happliy with 3 diferent SCSI chains (not all on the same Amiga :-), which all works
nicely with current settings:
- Cybertorm 3 UW controller, with 2 UW HD
- A4000T on board SCSI-2, with CDRW, CDR, HD
- WArpEngine SCSI-2, with CDRW, HD
However, some days ago, I learnt from another thread (now I can find it anymore) that TERM Power
does not imply Termination Enable. So I decided to check my SCSI chains. I also studied some
docs in italian language about SCSI, from which put under my nose more questions.
Q0) I learnt about SE, HVD and LVD electrical interfaces. None of my 3 controllers mention which
interface it support. Am I right in assuming (because of the age) that all of them use SE
interfaces?
Q1) Termination. As we all know, the Cyberstorm controller has no terminator. For this reason I
put it in the middle of the chain. At one end of the chain I put a Quantum Atlas 2 HDD with
Termination Enabled. At the other end a Fujitsu MAH3091MP. This HD is a LVD drive, but can work
also in SE mode. However, it does not have a TE jumper,although it has a Term Power enable
jumper. This would mean that my chain is not correctly terminated! :-( However it worked nicely
for years! How is it possible? Am I in danger of some hardware damage?
Q2) TERM Power. Here I am puzzled. How should I set TERM Power? The Cyberstorm docs says that one unit should provide TERM Power(I guess the Cyberstorm itself doesn't). The A4000T doc does not mention the issue, while WarpEngine can provide TP. In one chain, how many units have to provide the power?
Q3) Parity Check. The italian language docs, say that Parity Check should be enabled or disabled uniformly on all devices in a chain (all enabled or all disabled). For me this is tricky because some device (AFAIK, I don't have complete docs for any device) doesn't do it, some does always, and some can be enabled/disabled via jumpers.
Moreover, none of my 3 controller mentions this issue. What should I do?
Many thanks for your help!! :-)
