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- From: cone@controls.ccd.harris.com (Tom Cone)
- Subject: Re: Problems with Fast SCSI-II on Sun Sparc 10 (long)
- Message-ID: <1992Nov20.132944.7720@ccd.harris.com>
- Sender: usenet@ccd.harris.com
- Organization: Harris Controls and Composition
- References: <MRD.92Nov13160506@morsel.stdavids.picker.com> <1992Nov15.121008.12717@pt.com> <1992Nov17.100038.27178@panix.com>
- Date: Fri, 20 Nov 1992 13:29:44 GMT
- Lines: 28
-
- In article <1992Nov17.100038.27178@panix.com> alexis@panix.com (Alexis Rosen) writes:
- >I remember some discussion of FPT when IBM first introduced it. I seem to
- >recall that there was mention of some potential problems with FPT too.
- >
- >However... Assuming FPT is the solution we seek, where do we go about
- >terminating a Sparcstation 2? Obviously, the external end of the chain, but
- >what about inside the box? I have yet to get a straight answer as to where
- >(if anywhere) the internal part of the SCSI bus is terminated (I suspect that
- >it isn't but have no real basis on which to judge).
- >
-
- 1. The internal drive is terminated at the drive. SUN does it like IBM's
- internal/external controller. Terminate the external on the last device.
- 2. Aeronics sells the FPT's. Depending on quanity around $40.
- 3. Aeronics is working on an all line FPT. Should work even better than
- the three line.
- 4. Yes FPT works on SCSI-1 and SCSI-2.
- 5. In answer to someone elses question. The thru-put on the SCSI bus drops
- off after the fourth device. This is what we have seen in our tests
- on SCSI-1 and SCSI-2.
- 6. For FPT to work best it needs to installed at both ends of the bus.
- We have seen much better results than passive termination by just
- putting a FPT at the end though.
-
- Hope this helps.
-
- Tom
-
-