Rasana Atreya <[EMAIL PROTECTED]> wrote:
> - Tekram DC-390F based on Symbios Logic 53C875 chip.
Yes, works very reliably with Gerard Roudier's 3.0i ncr53c8xx driver.
The only thing I would like to know, some day, is how/if you need
to configure termination when using bizarre setups (for now I have
either used a fully non wide or a fully wide bus, and either
internal or external).
You want to do tricky things (the kind of things which usually
break on the Adaptec 2940UW if you do not disable automatic
termination).
> Since the Tekram does not have an external 50-pin connector, would I be
> able to use the ZIP drive with a 168-pin to 50-pin adapter?
Theoretically yes, although you have to double check this adapter
properly terminates the high lines. Most of the adapter sold in the
commerce do fancy things with the high lines. Also, check that
the adapter, if it terminates properly, terminates actively.
Also, you can use any two of the connectors, not more, presumably.
> - Is is acceptable to mix and match SCSI-2 and Ultra SCSI?
yes. However note that the ZIP drive, if it's IOMEGA, is rumoured
to have bad SCSI behaviour. Anyone can comment ?
> - Does the floppy drive have to be SCSI?
uh? Why should it be ?
> - Can internal devices be daisey-chained?
SCSI allows any chaining you want, as long as you respect the
following rules (those are for Ultra SCSI):
- active termination at each *end* of cable. One end could be
the ZIP external drive, the other end an internal SCSI HD.
If any of those is 50 pins (8 bit SCSI), you need proper high
bits termination
- maximum total cable length 1.2 meter
- minimum length between devices 30 cm
- no T like connection.
-
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